Trivial cleanups
Trivial cleanups

* strace.c (trace): Change ifdef LINUX to make a bit more sense,
  remove wrong comment at its endif. Slightly optimize
  "+++ killed by SIG +++" message for systems without WCOREDUMP macro.

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

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