Replace uses of IA64_FLAG_SIGTRAMP flag by checks against sigcontext_loc.
Replace uses of IA64_FLAG_SIGTRAMP flag by checks against sigcontext_loc.

(Logical change 1.18)

atanasyan/libunwind,libunwind/libunwind,krytarowski/libunwind,Chilledheart/libunwind,yuyichao/libunwind,cloudius-systems/libunwind,igprof/libunwind,SyndicateRogue/libunwind,android-ia/platform_external_libunwind,bo-on-software/libunwind,cms-externals/libunwind,unkadoug/libunwind,pathscale/libunwind,martyone/libunwind,krytarowski/libunwind,zliu2014/libunwind-tilegx,frida/libunwind,rntz/libunwind,dropbox/libunwind,dreal-deps/libunwind,mpercy/libunwind,vtjnash/libunwind,olibc/libunwind,rogwfu/libunwind,maltek/platform_external_libunwind,cloudius-systems/libunwind,frida/libunwind,rantala/libunwind,maltek/platform_external_libunwind,fdoray/libunwind,jrmuizel/libunwind,dagar/libunwind,rntz/libunwind,yuyichao/libunwind,Chilledheart/libunwind,olibc/libunwind,dagar/libunwind,vegard/libunwind,djwatson/libunwind,geekboxzone/lollipop_external_libunwind,tronical/libunwind,rantala/libunwind,evaautomation/libunwind,dropbox/libunwind,zliu2014/libunwind-tilegx,joyent/libunwind,zeldin/platform_external_libunwind,jrmuizel/libunwind,Chilledheart/libunwind,adsharma/libunwind,dreal-deps/libunwind,androidarmv6/android_external_libunwind,CyanogenMod/android_external_libunwind,unkadoug/libunwind,djwatson/libunwind,cms-externals/libunwind,joyent/libunwind,tkelman/libunwind,project-zerus/libunwind,mpercy/libunwind,ehsan/libunwind,vtjnash/libunwind,lat/libunwind,tronical/libunwind,geekboxzone/lollipop_external_libunwind,0xlab/0xdroid-external_libunwind,joyent/libunwind,mpercy/libunwind,rantala/libunwind,libunwind/libunwind,androidarmv6/android_external_libunwind,tony/libunwind,dropbox/libunwind,tronical/libunwind,atanasyan/libunwind,vegard/libunwind,project-zerus/libunwind,tony/libunwind,DroidSim/platform_external_libunwind,djwatson/libunwind,vegard/libunwind,igprof/libunwind,CyanogenMod/android_external_libunwind,maltek/platform_external_libunwind,geekboxzone/mmallow_external_libunwind,martyone/libunwind,ehsan/libunwind,olibc/libunwind,geekboxzone/mmallow_external_libunwind,igprof/libunwind,DroidSim/platform_external_libunwind,android-ia/platform_external_libunwind,wdv4758h/libunwind,adsharma/libunwind,pathscale/libunwind,androidarmv6/android_external_libunwind,evaautomation/libunwind,fillexen/libunwind,wdv4758h/libunwind,0xlab/0xdroid-external_libunwind,bo-on-software/libunwind,tony/libunwind,unkadoug/libunwind,rntz/libunwind,fdoray/libunwind,Keno/libunwind,yuyichao/libunwind,0xlab/0xdroid-external_libunwind,libunwind/libunwind,cms-externals/libunwind,martyone/libunwind,evaautomation/libunwind,rogwfu/libunwind,lat/libunwind,geekboxzone/lollipop_external_libunwind,fillexen/libunwind,zeldin/platform_external_libunwind,Keno/libunwind,ehsan/libunwind,geekboxzone/mmallow_external_libunwind,atanasyan/libunwind,rogwfu/libunwind,adsharma/libunwind,Keno/libunwind,android-ia/platform_external_libunwind,vtjnash/libunwind,fdoray/libunwind,SyndicateRogue/libunwind,lat/libunwind,atanasyan/libunwind-android,pathscale/libunwind,zliu2014/libunwind-tilegx,krytarowski/libunwind,fillexen/libunwind,atanasyan/libunwind-android,bo-on-software/libunwind,cloudius-systems/libunwind,SyndicateRogue/libunwind,wdv4758h/libunwind,CyanogenMod/android_external_libunwind,DroidSim/platform_external_libunwind,project-zerus/libunwind,jrmuizel/libunwind,atanasyan/libunwind-android,tkelman/libunwind,dreal-deps/libunwind,dagar/libunwind,zeldin/platform_external_libunwind,frida/libunwind,tkelman/libunwind