tests: Increase verbosity in *_test.in checks

In this case it does not hurt to increase bash execution verbosity so
we can get more insight in case of issues.

Signed-off-by: Leo Sandoval <lsandova@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

tests/f2fs_test.in

@@ -1,6 +1,6 @@
 #!@BUILD_SHEBANG@
 
-set -e
+set -ex
 
 if [ "x$EUID" = "x" ] ; then
  EUID=`id -u`