Fix test to flush stdout: sometimes goes into pipe, causing failure.
[ccan] / tap /
drwxr-xr-x   ..
-rw-r--r-- 128 Makefile.am
-rw-r--r-- 16734 Makefile.in
-rw-r--r-- 1416 _info.c
-rw-r--r-- 9751 tap.3
-rw-r--r-- 8596 tap.c
-rw-r--r-- 8187 tap.h
drwxr-xr-x - test