PTRACE_SEIZE can set ptrace options immediately, use this feature
PTRACE_SEIZE can set ptrace options immediately, use this feature

This eliminates some rare bugs, such as post-execve SIGTRAP
generation when we attach to a process, and it manages to finish
execve'ing before we set TRACEEXEC option to suppress that.

Signed-off-by: Denys Vlasenko <50fbbd36fe0f9c8261d4a3c762c8c29ffb35e48f@redhat.com>

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