Use -fstack-protector-all (stack canaries) for Mac debug builds.
Use -fstack-protector-all (stack canaries) for Mac debug builds.

This was previously in effect at r29591 and then backed out at r29601 because
it may have caused problems with Valgrind. The Valgrind problems were probably
actually caused by -pie, which was recently reintroduced with protection
against being used in Valgrind configurations. I don't think that we have any
Valgrind builds that use the Debug configuration, so reintroducing this here
shouldn't have any effect on Valgrind.

Ancient history: in the pre-GYP days, we had -fstack-protector and
-fstack-protector-all in the debug.xcconfig that our Xcode-based build used.
See
http://src.chromium.org/viewvc/chrome/trunk/src/build/debug.xcconfig?view=markup&pathrev=21959

More information on this option:

http://developer.apple.com/library/mac/#documentation/DeveloperTools/gcc-4.2.1/gcc/Optimize-Options.html#index-fbtr_002dbb_002dexclusive-615

http://en.wikipedia.org/wiki/Buffer_overflow_protection#GCC_Stack-Smashing_Protector_.28ProPolice.29

BUG=16713 (not really, that's for release builds, but close enough)
TEST=everything
Review URL: http://codereview.chromium.org/7291019

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@91301 0039d316-1c4b-4281-b951-d872f2087c98

Just-D/chromium-1,markYoungH/chromium.src,hgl888/chromium-crosswalk,markYoungH/chromium.src,patrickm/chromium.src,dushu1203/chromium.src,Jonekee/chromium.src,hgl888/chromium-crosswalk-efl,chuan9/chromium-crosswalk,Chilledheart/chromium,junmin-zhu/chromium-rivertrail,ltilve/chromium,junmin-zhu/chromium-rivertrail,Chilledheart/chromium,timopulkkinen/BubbleFish,Fireblend/chromium-crosswalk,hujiajie/pa-chromium,rogerwang/chromium,Pluto-tv/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,fujunwei/chromium-crosswalk,timopulkkinen/BubbleFish,crosswalk-project/chromium-crosswalk-efl,anirudhSK/chromium,mohamed--abdel-maksoud/chromium.src,bright-sparks/chromium-spacewalk,dednal/chromium.src,junmin-zhu/chromium-rivertrail,patrickm/chromium.src,Fireblend/chromium-crosswalk,Jonekee/chromium.src,mogoweb/chromium-crosswalk,markYoungH/chromium.src,dednal/chromium.src,dushu1203/chromium.src,anirudhSK/chromium,keishi/chromium,bright-sparks/chromium-spacewalk,dednal/chromium.src,ltilve/chromium,robclark/chromium,hgl888/chromium-crosswalk,jaruba/chromium.src,anirudhSK/chromium,Just-D/chromium-1,mohamed--abdel-maksoud/chromium.src,jaruba/chromium.src,hujiajie/pa-chromium,mohamed--abdel-maksoud/chromium.src,Chilledheart/chromium,chuan9/chromium-crosswalk,M4sse/chromium.src,keishi/chromium,krieger-od/nwjs_chromium.src,fujunwei/chromium-crosswalk,ChromiumWebApps/chromium,Fireblend/chromium-crosswalk,Jonekee/chromium.src,littlstar/chromium.src,hujiajie/pa-chromium,mogoweb/chromium-crosswalk,littlstar/chromium.src,chuan9/chromium-crosswalk,jaruba/chromium.src,dednal/chromium.src,PeterWangIntel/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Fireblend/chromium-crosswalk,dushu1203/chromium.src,littlstar/chromium.src,patrickm/chromium.src,nacl-webkit/chrome_deps,littlstar/chromium.src,hujiajie/pa-chromium,mogoweb/chromium-crosswalk,jaruba/chromium.src,bright-sparks/chromium-spacewalk,anirudhSK/chromium,chuan9/chromium-crosswalk,rogerwang/chromium,dednal/chromium.src,ChromiumWebApps/chromium,M4sse/chromium.src,krieger-od/nwjs_chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,dednal/chromium.src,rogerwang/chromium,axinging/chromium-crosswalk,markYoungH/chromium.src,M4sse/chromium.src,jaruba/chromium.src,anirudhSK/chromium,pozdnyakov/chromium-crosswalk,rogerwang/chromium,nacl-webkit/chrome_deps,hujiajie/pa-chromium,markYoungH/chromium.src,jaruba/chromium.src,ondra-novak/chromium.src,crosswalk-project/chromium-crosswalk-efl,timopulkkinen/BubbleFish,keishi/chromium,zcbenz/cefode-chromium,markYoungH/chromium.src,markYoungH/chromium.src,chuan9/chromium-crosswalk,anirudhSK/chromium,mogoweb/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk,markYoungH/chromium.src,pozdnyakov/chromium-crosswalk,dushu1203/chromium.src,Pluto-tv/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,fujunwei/chromium-crosswalk,hgl888/chromium-crosswalk,jaruba/chromium.src,patrickm/chromium.src,ChromiumWebApps/chromium,nacl-webkit/chrome_deps,Fireblend/chromium-crosswalk,axinging/chromium-crosswalk,markYoungH/chromium.src,timopulkkinen/BubbleFish,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,rogerwang/chromium,robclark/chromium,nacl-webkit/chrome_deps,crosswalk-project/chromium-crosswalk-efl,dednal/chromium.src,TheTypoMaster/chromium-crosswalk,chuan9/chromium-crosswalk,Pluto-tv/chromium-crosswalk,axinging/chromium-crosswalk,hgl888/chromium-crosswalk-efl,junmin-zhu/chromium-rivertrail,zcbenz/cefode-chromium,TheTypoMaster/chromium-crosswalk,patrickm/chromium.src,zcbenz/cefode-chromium,mohamed--abdel-maksoud/chromium.src,ChromiumWebApps/chromium,M4sse/chromium.src,pozdnyakov/chromium-crosswalk,Chilledheart/chromium,robclark/chromium,robclark/chromium,dednal/chromium.src,robclark/chromium,axinging/chromium-crosswalk,M4sse/chromium.src,Just-D/chromium-1,anirudhSK/chromium,krieger-od/nwjs_chromium.src,littlstar/chromium.src,hgl888/chromium-crosswalk-efl,anirudhSK/chromium,zcbenz/cefode-chromium,hujiajie/pa-chromium,keishi/chromium,patrickm/chromium.src,rogerwang/chromium,littlstar/chromium.src,TheTypoMaster/chromium-crosswalk,keishi/chromium,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,ondra-novak/chromium.src,rogerwang/chromium,mogoweb/chromium-crosswalk,Jonekee/chromium.src,Chilledheart/chromium,pozdnyakov/chromium-crosswalk,rogerwang/chromium,nacl-webkit/chrome_deps,junmin-zhu/chromium-rivertrail,keishi/chromium,bright-sparks/chromium-spacewalk,ltilve/chromium,PeterWangIntel/chromium-crosswalk,littlstar/chromium.src,M4sse/chromium.src,timopulkkinen/BubbleFish,Just-D/chromium-1,Just-D/chromium-1,Pluto-tv/chromium-crosswalk,hujiajie/pa-chromium,robclark/chromium,zcbenz/cefode-chromium,pozdnyakov/chromium-crosswalk,hgl888/chromium-crosswalk,Chilledheart/chromium,dushu1203/chromium.src,rogerwang/chromium,anirudhSK/chromium,Chilledheart/chromium,fujunwei/chromium-crosswalk,jaruba/chromium.src,Just-D/chromium-1,zcbenz/cefode-chromium,krieger-od/nwjs_chromium.src,Jonekee/chromium.src,axinging/chromium-crosswalk,hgl888/chromium-crosswalk-efl,hujiajie/pa-chromium,mohamed--abdel-maksoud/chromium.src,ondra-novak/chromium.src,M4sse/chromium.src,hgl888/chromium-crosswalk-efl,mogoweb/chromium-crosswalk,zcbenz/cefode-chromium,TheTypoMaster/chromium-crosswalk,fujunwei/chromium-crosswalk,mohamed--abdel-maksoud/chromium.src,fujunwei/chromium-crosswalk,crosswalk-project/chromium-crosswalk-efl,Fireblend/chromium-crosswalk,axinging/chromium-crosswalk,hujiajie/pa-chromium,ltilve/chromium,dednal/chromium.src,fujunwei/chromium-crosswalk,chuan9/chromium-crosswalk,ChromiumWebApps/chromium,nacl-webkit/chrome_deps,ChromiumWebApps/chromium,ChromiumWebApps/chromium,junmin-zhu/chromium-rivertrail,crosswalk-project/chromium-crosswalk-efl,keishi/chromium,junmin-zhu/chromium-rivertrail,pozdnyakov/chromium-crosswalk,pozdnyakov/chromium-crosswalk,timopulkkinen/BubbleFish,chuan9/chromium-crosswalk,ondra-novak/chromium.src,hgl888/chromium-crosswalk-efl,Just-D/chromium-1,junmin-zhu/chromium-rivertrail,Pluto-tv/chromium-crosswalk,bright-sparks/chromium-spacewalk,ChromiumWebApps/chromium,Jonekee/chromium.src,ondra-novak/chromium.src,keishi/chromium,krieger-od/nwjs_chromium.src,crosswalk-project/chromium-crosswalk-efl,nacl-webkit/chrome_deps,bright-sparks/chromium-spacewalk,jaruba/chromium.src,zcbenz/cefode-chromium,axinging/chromium-crosswalk,chuan9/chromium-crosswalk,timopulkkinen/BubbleFish,zcbenz/cefode-chromium,PeterWangIntel/chromium-crosswalk,junmin-zhu/chromium-rivertrail,Just-D/chromium-1,timopulkkinen/BubbleFish,bright-sparks/chromium-spacewalk,axinging/chromium-crosswalk,mogoweb/chromium-crosswalk,Pluto-tv/chromium-crosswalk,Chilledheart/chromium,krieger-od/nwjs_chromium.src,markYoungH/chromium.src,littlstar/chromium.src,ChromiumWebApps/chromium,anirudhSK/chromium,dushu1203/chromium.src,keishi/chromium,TheTypoMaster/chromium-crosswalk,axinging/chromium-crosswalk,nacl-webkit/chrome_deps,markYoungH/chromium.src,keishi/chromium,Just-D/chromium-1,fujunwei/chromium-crosswalk,TheTypoMaster/chromium-crosswalk,anirudhSK/chromium,mohamed--abdel-maksoud/chromium.src,mohamed--abdel-maksoud/chromium.src,krieger-od/nwjs_chromium.src,TheTypoMaster/chromium-crosswalk,patrickm/chromium.src,mohamed--abdel-maksoud/chromium.src,zcbenz/cefode-chromium,dushu1203/chromium.src,mogoweb/chromium-crosswalk,mogoweb/chromium-crosswalk,hgl888/chromium-crosswalk,hgl888/chromium-crosswalk-efl,bright-sparks/chromium-spacewalk,mogoweb/chromium-crosswalk,ondra-novak/chromium.src,anirudhSK/chromium,dushu1203/chromium.src,ltilve/chromium,pozdnyakov/chromium-crosswalk,Jonekee/chromium.src,junmin-zhu/chromium-rivertrail,Chilledheart/chromium,junmin-zhu/chromium-rivertrail,zcbenz/cefode-chromium,TheTypoMaster/chromium-crosswalk,fujunwei/chromium-crosswalk,M4sse/chromium.src,Pluto-tv/chromium-crosswalk,ChromiumWebApps/chromium,pozdnyakov/chromium-crosswalk,jaruba/chromium.src,patrickm/chromium.src,robclark/chromium,pozdnyakov/chromium-crosswalk,M4sse/chromium.src,mohamed--abdel-maksoud/chromium.src,keishi/chromium,krieger-od/nwjs_chromium.src,dednal/chromium.src,dushu1203/chromium.src,hgl888/chromium-crosswalk,timopulkkinen/BubbleFish,dushu1203/chromium.src,PeterWangIntel/chromium-crosswalk,pozdnyakov/chromium-crosswalk,hujiajie/pa-chromium,PeterWangIntel/chromium-crosswalk,Fireblend/chromium-crosswalk,bright-sparks/chromium-spacewalk,nacl-webkit/chrome_deps,crosswalk-project/chromium-crosswalk-efl,nacl-webkit/chrome_deps,axinging/chromium-crosswalk,rogerwang/chromium,ChromiumWebApps/chromium,mohamed--abdel-maksoud/chromium.src,hgl888/chromium-crosswalk,jaruba/chromium.src,dushu1203/chromium.src,PeterWangIntel/chromium-crosswalk,ltilve/chromium,timopulkkinen/BubbleFish,Jonekee/chromium.src,hgl888/chromium-crosswalk-efl,ltilve/chromium,Jonekee/chromium.src,Fireblend/chromium-crosswalk,hgl888/chromium-crosswalk-efl,Fireblend/chromium-crosswalk,robclark/chromium,robclark/chromium,robclark/chromium,nacl-webkit/chrome_deps,crosswalk-project/chromium-crosswalk-efl,ondra-novak/chromium.src,ChromiumWebApps/chromium,ondra-novak/chromium.src,ltilve/chromium,patrickm/chromium.src,axinging/chromium-crosswalk,PeterWangIntel/chromium-crosswalk,hgl888/chromium-crosswalk-efl,ltilve/chromium,krieger-od/nwjs_chromium.src,ondra-novak/chromium.src,timopulkkinen/BubbleFish,Jonekee/chromium.src,hujiajie/pa-chromium,dednal/chromium.src