test-skeleton.c: xmalloc, xcalloc, xrealloc are potentially unused

__attribute__ ((used)) means that the function has to be
emitted in assembly because it is referenced in ways the
compiler cannot detect (such as asm statements, or some
post-processing on the generated assembly).

The unused attribute needs to come first, otherwise it is
applied to the return type and not the function definition.

1 files changed, 5 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 98d78c9c34..5f9edb42eb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2016-06-23  Florian Weimer  <fweimer@redhat.com>
+
+	* test-skeleton.c (xmalloc, xcalloc, xrealloc): Mark as
+	potentially unused.
+
 2016-06-22  Florian Weimer  <fweimer@redhat.com>
 
 	* test-skeleton.c (write_message): New function.