test/Preprocessor/include-directive2.c: Get rid of using <float.h> to avoid #include_next on mingw.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134896 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/include-directive2.c b/test/Preprocessor/include-directive2.c
index 5f1ee3c..b1a9940 100644
--- a/test/Preprocessor/include-directive2.c
+++ b/test/Preprocessor/include-directive2.c
@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -ffreestanding -Eonly -verify %s 
-#  define HEADER <float.h>
+#  define HEADER <stdarg.h>
 
 #  include HEADER