The DTrace harness (dtest.pl) executes DTrace scripts with the -C flag,

which causes dtrace(1) to run the C preprocessor on input scripts before
executing them. Suppress some warnings emitted by the preprocessor which are
confusing the DTrace lexer tests.

MFC after:	1 week

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/lexer/err.D_CHR_NL.char.d

@@ -36,8 +36,10 @@
 
 BEGIN
 {
-
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-pp-token"
 	h = '
 		';
+#pragma clang diagnostic pop
 	exit(0);
 }

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/lexer/err.D_CHR_NULL.char.d

@@ -36,7 +36,9 @@
 
 BEGIN
 {
-
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-pp-token"
 	h = '';
 	exit(0);
+#pragma clang diagnostic pop
 }

cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/lexer/err.D_STR_NL.string.d

@@ -36,9 +36,11 @@
 
 BEGIN
 {
-
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-pp-token"
 	h = "hello
 
 		there";
 	exit(0);
+#pragma clang diagnostic pop
 }