Add multi-personality support to stack_t decoding
Add multi-personality support to stack_t decoding

stack_t is one of many structures that contain members
whose size differs between 32-bit and 64-bit personalities.

* signal.c (print_stack_t): Decode 32-bit stack_t on a 64-bit host.

Reported-by: Elliott Hughes <fcce078dda1e415b072bbd7a0d74a20c665f0947@google.com>

Distrotech/strace,DirtyUnicorns/android_external_strace,vrastogi/strace,cuviper/strace,xin3liang/platform_external_strace,AOSP-YU/platform_external_strace,pombredanne/strace,vrastogi/strace,bigzz/strace_android,YUPlayGodDev/platform_external_strace,android-ia/platform_external_strace,CyanogenMod/android_external_strace,Yu-AndroidM/android_external_strace,geekboxzone/lollipop_external_strace,geofft/strace,Saruta/strace,bnoordhuis/strace,geekboxzone/lollipop_external_strace,cuviper/strace,bnoordhuis/strace,android-ia/platform_external_strace,AOSP-YU/platform_external_strace,geofft/strace,geofft/strace,lkundrak/strace,geekboxzone/mmallow_external_strace,kapdop/android_external_strace,bigzz/strace_android,bnoordhuis/strace,pombredanne/strace,pombredanne/strace,kapdop/android_external_strace,lkundrak/strace,MonkeyZZZZ/platform_external_strace,vrastogi/strace,CyanogenMod/android_external_strace,geekboxzone/lollipop_external_strace,kapdop/android_external_strace,MonkeyZZZZ/platform_external_strace,bigzz/strace_android,pombredanne/strace,Infinitive-OS/platform_external_strace,DirtyUnicorns/android_external_strace,Distrotech/strace,Yu-AndroidM/android_external_strace,TeamExodus/external_strace,Distrotech/strace,cuviper/strace,TeamExodus/external_strace,Saruta/strace,YUPlayGodDev/platform_external_strace,AOSP-YU/platform_external_strace,lkundrak/strace,MonkeyZZZZ/platform_external_strace,Distrotech/strace,Distrotech/strace,lkundrak/strace,android-ia/platform_external_strace,geekboxzone/lollipop_external_strace,geekboxzone/mmallow_external_strace,Infinitive-OS/platform_external_strace,kapdop/android_external_strace,DirtyUnicorns/android_external_strace,xin3liang/platform_external_strace,cuviper/strace,geofft/strace,xin3liang/platform_external_strace,Infinitive-OS/platform_external_strace,TeamExodus/external_strace,CyanogenMod/android_external_strace,Yu-AndroidM/android_external_strace,geofft/strace,YUPlayGodDev/platform_external_strace,kapdop/android_external_strace,Infinitive-OS/platform_external_strace,MonkeyZZZZ/platform_external_strace,geekboxzone/lollipop_external_strace,vrastogi/strace,CyanogenMod/android_external_strace,Saruta/strace,cuviper/strace,MonkeyZZZZ/platform_external_strace,bnoordhuis/strace,AOSP-YU/platform_external_strace,TeamExodus/external_strace,YUPlayGodDev/platform_external_strace,Yu-AndroidM/android_external_strace,bigzz/strace_android,xin3liang/platform_external_strace,Saruta/strace,vrastogi/strace,Infinitive-OS/platform_external_strace,geekboxzone/mmallow_external_strace,android-ia/platform_external_strace,CyanogenMod/android_external_strace,AOSP-YU/platform_external_strace,geekboxzone/mmallow_external_strace,YUPlayGodDev/platform_external_strace,Saruta/strace,bigzz/strace_android,TeamExodus/external_strace,android-ia/platform_external_strace,DirtyUnicorns/android_external_strace,Yu-AndroidM/android_external_strace,DirtyUnicorns/android_external_strace,geekboxzone/mmallow_external_strace