process_vm_readv may return ESRCH if tracee was killed, don't complain
process_vm_readv may return ESRCH if tracee was killed, don't complain

Discovered by running test/sigkill_rain under strace.

* util.c (umoven): Do not emit error message if process_vm_readv
fails with ESRCH.
(umovestr): LikeWise.

Signed-off-by: Denys Vlasenko <42afb3a19136e88700e8b77002ea6a5a94c16782@googlemail.com>

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