Ignore fflush(3) return value
Ignore fflush(3) return value

strace used to honor fflush(3) return value in trace_syscall_entering
which resulted to tracees not being PTRACE_SYSCALL'ed which in turn
caused nasty hangups like this one:

$ strace -o'|:' pwd
|:: Broken pipe

There is little strace can do in case of fflush(3) returning EOF, and
hangup is certainly not the best solution for the issue.

* syscall.c (trace_syscall_entering): Ignore fflush(3) return value.

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