Description: Fix libmissing thread create test

Author: Thomas Andrejak <thomas.andrejak@gmail.com>

Last-Update: 2019-10-11

--- a/libmissing/tests/test-thread_create.c	2019-09-17 19:29:40.129501083 -0400

+++ b/libmissing/tests/test-thread_create.c	2019-10-11 17:32:48.182372602 -0400

@@ -68,7 +68,7 @@

   else

     {

 #if USE_POSIX_THREADS || USE_SOLARIS_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS

-      fputs ("glthread_create failed\n", stderr);

+      fprintf (stderr, "glthread_create failed with errno %d\n", errno);

       return 1;

 #else

       fputs ("Skipping test: multithreading not enabled\n", stderr);