Use update_nat() instead of equivalent open code.
Use update_nat() instead of equivalent open code.

(Logical change 1.301)

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