PR testsuite/79115 - FAIL: gcc.dg/pr78768.c execution test on arm, aarch64

gcc/testsuite/ChangeLog
	* gcc.dg/pr78768.c: Make it a link-only test.

From-SVN: r244537

gcc/testsuite/ChangeLog

+2017-01-17  Martin Sebor  <msebor@redhat.com>
+
+	PR testsuite/79115
+	* gcc.dg/pr78768.c: Make it a link-only test.
+
 2017-01-17  David Malcolm  <dmalcolm@redhat.com>
 
 	PR c++/71497

gcc/testsuite/gcc.dg/pr78768.c

 /* PR c/78768 - -Walloca-larger-than and -Wformat-overflow warnings disabled
    by -flto
-  { dg-do run }
+  { dg-do link }
   { dg-require-effective-target lto }
   { dg-options "-O2 -Walloca-larger-than=10 -Wformat -Wformat-overflow -flto" } */