Fix missing %s in run string causing hang during tests.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58394 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/PR2923.c b/test/Sema/PR2923.c
index dac25a2..5d82776 100644
--- a/test/Sema/PR2923.c
+++ b/test/Sema/PR2923.c
@@ -1,4 +1,4 @@
-// RUN: clang -fsyntax-only -verify
+// RUN: clang -fsyntax-only -verify %s
 
 // Test for absence of crash reported in PR 2923:
 //