Build gcc.target/sparc/20181129-?.c as C99

	* gcc.target/sparc/20181129-1.c: Compile with -std=c99.
	* gcc.target/sparc/20181129-2.c: Likewise.

From-SVN: r266824

gcc/testsuite/ChangeLog

+2018-12-05  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	* gcc.target/sparc/20181129-1.c: Compile with -std=c99.
+	* gcc.target/sparc/20181129-2.c: Likewise.
+
 2018-12-05  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/87360

gcc/testsuite/gcc.target/sparc/20181129-1.c

@@ -2,6 +2,7 @@
 /* Reported by Rainer Orth <ro@gcc.gnu.org> */
 
 /* { dg-do run } */
+/* { dg-options "-std=c99" } */
 
 #include <stdarg.h>
 

gcc/testsuite/gcc.target/sparc/20181129-2.c

@@ -2,6 +2,7 @@
 /* Reported by Rainer Orth <ro@gcc.gnu.org> */
 
 /* { dg-do run } */
+/* { dg-options "-std=c99" } */
 
 #include <stdarg.h>