Add xmalloc_failed() function to common-utils.c in to avoid the need to link in libiberty's xmalloc code.

gdb/ChangeLog

@@ -1,3 +1,8 @@
+2016-06-01  Nick Clifton  <nickc@redhat.com>
+
+	* common/common-utils.c (xmalloc_failed): New function.  Provided
+	so that the version in libiberty is not linked in.
+
 2016-06-01  Markus Metzger  <markus.t.metzger@intel.com>
 
 	* infcmd.c (skip_finish_frames): New.

gdb/common/common-utils.c

@@ -100,6 +100,12 @@ xfree (void *ptr)
     free (ptr);		/* ARI: free */
 }
 
+void
+xmalloc_failed (size_t size)
+{
+  malloc_failure (size);
+}
+
 /* Like asprintf/vasprintf but get an internal_error if the call
    fails. */