Fix printing clone flags
Fix printing clone flags

When we trace clone() syscall with only exit signal as clone
flags, strace would print an unnecessary OR operator.

* process.c (sys_clone): Fix this.

Signed-off-by: Wang Chao <017c5b5ecd1af05550e9eb68fa0869dc2f98cddc@cn.fujitsu.com>

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