gcc_diag-11.c: Skip until -Wformat-diag has been committed.

gcc/testsuite/ChangeLog:

	* gcc.dg/format/gcc_diag-11.c: Skip until -Wformat-diag has
	been committed.

From-SVN: r271975

gcc/testsuite/ChangeLog

+2019-06-05  Martin Sebor  <msebor@redhat.com>
+
+	* gcc.dg/format/gcc_diag-11.c: Skip until -Wformat-diag has
+	been committed.
+
 2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	* g++.dg/diagnostic/return-type-invalid-1.C: New.

gcc/testsuite/gcc.dg/format/gcc_diag-11.c

 /* Test warnings for common punctuation, quoting, and spelling issues
    in GCC diagnostics.
    { dg-do compile }
-   { dg-options "-Wformat -Wformat-diag" } */
+   { dg-options "-Wformat -Wformat-diag" }
+   { dg-skip-if "-Wformat-diag not available yet" { *-*-* } }
 
 /* Magic identifiers must be set before the attribute is used.  */