(check_local_unw_abi): Check for _U${plat}_strerror(). (check_generic_unw_abi): Likewise.
(check_local_unw_abi): Check for _U${plat}_strerror().
(check_generic_unw_abi): Likewise.

(Logical change 1.245)

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