Update ninja_syntax.py from upstream.
Update ninja_syntax.py from upstream.

This is ninja_syntax.py as of ninja commit
368f5bc64ddd2dcea2662d6c932157314be3e09b . It's newer than the latest
ninja release because I want to provide an opt-in flag for the "deps"
feature, which isn't in a ninja release yet.

TBR=scottmg
Review URL: https://codereview.chromium.org/13915013

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@1609 78cadc50-ecff-11dd-a971-7dbc132099af

omasanori/gyp,Chilledheart/gyp,LazyCodingCat/gyp,bpsinc-native/src_tools_gyp,bnoordhuis/gyp,cchamberlain/gyp,kevinchen3315/gyp-git,sport-monkey/GYP,luvit/gyp,Danath/gyp,chromium/gyp,openpeer/webrtc-gyp,Omegaphora/external_chromium_org_tools_gyp,cchamberlain/gyp,azunite/gyp_20150930,yjhjstz/gyp,erikge/watch_gyp,trafi/gyp,Jack-Q/GYP-copy,springmeyer/gyp,alexcrichton/gyp,springmeyer/gyp,mgamer/gyp,kevinchen3315/gyp-git,MIPS/external-chromium_org-tools-gyp,msc-/gyp,pandaxcl/gyp,xin3liang/platform_external_chromium_org_tools_gyp,tarc/gyp,yjhjstz/gyp,carlTLR/gyp,mumble-voip/libmumble-gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,duanhjlt/gyp,sanyaade-teachings/gyp,brson/gyp,turbulenz/gyp,ttyangf/pdfium_gyp,LazyCodingCat/gyp,AOSPU/external_chromium_org_tools_gyp,openpeer/webrtc-gyp,sdklite/gyp,MIPS/external-chromium_org-tools-gyp,erikge/watch_gyp,ttyangf/gyp,pandaxcl/gyp,clar/gyp,mgamer/gyp,sanyaade-teachings/gyp,duanhjlt/gyp,svn2github/gyp,android-ia/platform_external_chromium_org_tools_gyp,clar/gyp,msc-/gyp,cysp/gyp,ryfx/gyp,mistydemeo/gyp,bnq4ever/gypgoogle,dougbeal/gyp,duanhjlt/gyp,Phuehvk/gyp,AWhetter/gyp,yinquan529/platform-external-chromium_org-tools-gyp,msc-/gyp,sloanyang/gyp,turbulenz/gyp,azunite/gyp,azunite/gyp,luvit/gyp,Danath/gyp,pandaxcl/gyp,amoikevin/gyp,pandaxcl/gyp,openpeer/webrtc-gyp,luvit/gyp,adblockplus/gyp,saghul/gyn,Danath/gyp,yinquan529/platform-external-chromium_org-tools-gyp,enkripsi/gyp,sanyaade-teachings/gyp,sanyaade-teachings/gyp,sloanyang/gyp,dougbeal/gyp,bulldy80/gyp_unofficial,ryfx/gyp,saghul/gyn,Chilledheart/gyp,yinquan529/platform-external-chromium_org-tools-gyp,azunite/gyp,msc-/gyp,ttyangf/pdfium_gyp,bpsinc-native/src_tools_gyp,svn2github/gyp,Phuehvk/gyp,yangrongwei/gyp,azunite/gyp_20150930,tarc/gyp,ryfx/gyp,tarc/gyp,yangrongwei/gyp,saghul/gyn,adblockplus/gyp,svn2github/gyp,adblockplus/gyp,ttyangf/gyp,cysp/gyp,okwasi/gyp,enkripsi/gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,xin3liang/platform_external_chromium_org_tools_gyp,svn2github/kgyp,Jack-Q/GYP-copy,trafi/gyp,chromium/gyp,yjhjstz/gyp,bulldy80/gyp_unofficial,Chilledheart/gyp,turbulenz/gyp,kevinchen3315/gyp-git,bnq4ever/gypgoogle,amoikevin/gyp,svn2github/kgyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,clar/gyp,okwasi/gyp,AWhetter/gyp,azunite/gyp_20150930,xin3liang/platform_external_chromium_org_tools_gyp,Jack-Q/GYP-copy,svn2github/gyp,duanhjlt/gyp,sport-monkey/GYP,tarc/gyp,saghul/gyn,okwasi/gyp,erikge/watch_gyp,amoikevin/gyp,luvit/gyp,pandaxcl/gyp,Jack-Q/GYP-copy,Omegaphora/external_chromium_org_tools_gyp,chromium/gyp,turbulenz/gyp,clar/gyp,Chilledheart/gyp,bnq4ever/gypgoogle,mumble-voip/libmumble-gyp,bulldy80/gyp_unofficial,springmeyer/gyp,openpeer/webrtc-gyp,mgamer/gyp,svn2github/gyp,bnoordhuis/gyp,mgamer/gyp,sport-monkey/GYP,azunite/gyp_20150930,mapbox/gyp,cchamberlain/gyp,AOSPU/external_chromium_org_tools_gyp,trafi/gyp,cysp/gyp,bulldy80/gyp_unofficial,okumura/gyp,erikge/watch_gyp,carlTLR/gyp,omasanori/gyp,Omegaphora/external_chromium_org_tools_gyp,adblockplus/gyp,alexcrichton/gyp,pyokagan/gyp,Chilledheart/gyp,bnq4ever/gypgoogle,alexcrichton/gyp,AOSPU/external_chromium_org_tools_gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,dougbeal/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,bulldy80/gyp_unofficial,android-ia/platform_external_chromium_org_tools_gyp,LazyCodingCat/gyp,xin3liang/platform_external_chromium_org_tools_gyp,android-ia/platform_external_chromium_org_tools_gyp,bpsinc-native/src_tools_gyp,mapbox/gyp,carlTLR/gyp,enkripsi/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,svn2github/kgyp,cchamberlain/gyp,sport-monkey/GYP,svn2github/kgyp,okumura/gyp,svn2github/kgyp,mapbox/gyp,cysp/gyp,enkripsi/gyp,pyokagan/gyp,pyokagan/gyp,openpeer/webrtc-gyp,Jack-Q/GYP-copy,Omegaphora/external_chromium_org_tools_gyp,alexcrichton/gyp,okwasi/gyp,bnoordhuis/gyp,yjhjstz/gyp,mgamer/gyp,ttyangf/pdfium_gyp,carlTLR/gyp,Phuehvk/gyp,enkripsi/gyp,azunite/gyp_20150930,ryfx/gyp,LazyCodingCat/gyp,sdklite/gyp,bnoordhuis/gyp,bpsinc-native/src_tools_gyp,sloanyang/gyp,mumble-voip/libmumble-gyp,adblockplus/gyp,bnoordhuis/gyp,mapbox/gyp,trafi/gyp,MIPS/external-chromium_org-tools-gyp,ryfx/gyp,springmeyer/gyp,mapbox/gyp,bnq4ever/gypgoogle,brson/gyp,mistydemeo/gyp,okumura/gyp,okumura/gyp,Phuehvk/gyp,yangrongwei/gyp,sdklite/gyp,cysp/gyp,azunite/gyp,Danath/gyp,duanhjlt/gyp,azunite/gyp,sport-monkey/GYP,cchamberlain/gyp,yangrongwei/gyp,sdklite/gyp,chromium/gyp,dougbeal/gyp,ttyangf/gyp,trafi/gyp,AWhetter/gyp,ttyangf/gyp,ttyangf/pdfium_gyp,LazyCodingCat/gyp,sanyaade-teachings/gyp,springmeyer/gyp,yjhjstz/gyp,clar/gyp,sloanyang/gyp,ttyangf/pdfium_gyp,amoikevin/gyp,ttyangf/gyp,kevinchen3315/gyp-git,AWhetter/gyp,yinquan529/platform-external-chromium_org-tools-gyp,android-ia/platform_external_chromium_org_tools_gyp,omasanori/gyp,AOSPU/external_chromium_org_tools_gyp,AWhetter/gyp,sdklite/gyp,mistydemeo/gyp,chromium/gyp,Phuehvk/gyp,turbulenz/gyp,msc-/gyp,MIPS/external-chromium_org-tools-gyp,mistydemeo/gyp,omasanori/gyp,saghul/gyn,pyokagan/gyp,mumble-voip/libmumble-gyp,dougbeal/gyp,erikge/watch_gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,brson/gyp,tarc/gyp,Danath/gyp,pyokagan/gyp,amoikevin/gyp,brson/gyp,carlTLR/gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp