Fix compiler warnings about breaking strict-aliasing rules
Fix compiler warnings about breaking strict-aliasing rules

* system.c (sys_capget, sys_capset): Use proxy unions to cast long*
pointers to cap_user_header_t and cap_user_data_t pointers without
breaking strict-aliasing rules.

Reported-by: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@gentoo.org>

pgbovine/strace-plus,pombredanne/strace,bigzz/strace_android,Saruta/strace,MonkeyZZZZ/platform_external_strace,Saruta/strace,xin3liang/platform_external_strace,CyanogenMod/android_external_strace,lizh06/strace-plus,CyanogenMod/android_external_strace,Distrotech/strace,AOSP-YU/platform_external_strace,geekboxzone/lollipop_external_strace,CyanogenMod/android_external_strace,geekboxzone/mmallow_external_strace,lkundrak/strace,cuviper/strace,DirtyUnicorns/android_external_strace,MonkeyZZZZ/platform_external_strace,pombredanne/strace,android-ia/platform_external_strace,Andrey9kin/revisor,Infinitive-OS/platform_external_strace,gcode-mirror/strace-plus,vrastogi/strace,xin3liang/platform_external_strace,jamel/strace-plus,AOSP-YU/platform_external_strace,geofft/strace,geofft/strace,CyanogenMod/android_external_strace,Distrotech/strace,bnoordhuis/strace,MonkeyZZZZ/platform_external_strace,vrastogi/strace,TeamExodus/external_strace,Yu-AndroidM/android_external_strace,AOSP-YU/platform_external_strace,Distrotech/strace,geekboxzone/mmallow_external_strace,TeamExodus/external_strace,android-ia/platform_external_strace,bigzz/strace_android,lkundrak/strace,lizh06/strace-plus,vrastogi/strace,Yu-AndroidM/android_external_strace,xin3liang/platform_external_strace,pombredanne/strace,gcode-mirror/strace-plus,Infinitive-OS/platform_external_strace,kapdop/android_external_strace,Infinitive-OS/platform_external_strace,kapdop/android_external_strace,DirtyUnicorns/android_external_strace,geekboxzone/mmallow_external_strace,Yu-AndroidM/android_external_strace,Saruta/strace,geekboxzone/lollipop_external_strace,vrastogi/strace,YUPlayGodDev/platform_external_strace,bigzz/strace_android,pgbovine/strace-plus,MonkeyZZZZ/platform_external_strace,lizh06/strace-plus,bigzz/strace_android,geekboxzone/mmallow_external_strace,android-ia/platform_external_strace,YUPlayGodDev/platform_external_strace,Saruta/strace,kapdop/android_external_strace,vrastogi/strace,geekboxzone/lollipop_external_strace,bnoordhuis/strace,xin3liang/platform_external_strace,YUPlayGodDev/platform_external_strace,TeamExodus/external_strace,android-ia/platform_external_strace,DirtyUnicorns/android_external_strace,bnoordhuis/strace,android-ia/platform_external_strace,MonkeyZZZZ/platform_external_strace,pgbovine/strace-plus,lizh06/strace-plus,gcode-mirror/strace-plus,cuviper/strace,Andrey9kin/revisor,lkundrak/strace,gcode-mirror/strace-plus,Infinitive-OS/platform_external_strace,DirtyUnicorns/android_external_strace,TeamExodus/external_strace,jamel/strace-plus,kapdop/android_external_strace,geofft/strace,jamel/strace-plus,bigzz/strace_android,Andrey9kin/revisor,geekboxzone/lollipop_external_strace,cuviper/strace,TeamExodus/external_strace,Distrotech/strace,Distrotech/strace,Yu-AndroidM/android_external_strace,pombredanne/strace,bnoordhuis/strace,lizh06/strace-plus,Saruta/strace,cuviper/strace,pgbovine/strace-plus,AOSP-YU/platform_external_strace,DirtyUnicorns/android_external_strace,pgbovine/strace-plus,geofft/strace,lkundrak/strace,cuviper/strace,CyanogenMod/android_external_strace,kapdop/android_external_strace,Andrey9kin/revisor,Infinitive-OS/platform_external_strace,YUPlayGodDev/platform_external_strace,geekboxzone/lollipop_external_strace,Yu-AndroidM/android_external_strace,geekboxzone/mmallow_external_strace,AOSP-YU/platform_external_strace,gcode-mirror/strace-plus,geofft/strace,YUPlayGodDev/platform_external_strace,jamel/strace-plus,jamel/strace-plus