* fix typo that was confusing sh when gcc-like compilers were not used

This commit was SVN r4255.

config/ompi_setup_cc.m4

@@ -60,7 +60,7 @@ int i = 3;
     fi
 else
     # We never thought that this was gcc to begin with
-    msg=not applicable
+    msg="not applicable"
     TRULY_GCC=no
 fi
 AC_MSG_RESULT([$msg])