[driver] When creating the compiler invocation out of command-line
arguments, force use of clang frontend for the driver.

Fixes rdar://11356765.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@157205 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Index/index-kernel-invocation.cpp b/test/Index/index-kernel-invocation.cpp
new file mode 100644
index 0000000..dba8e6b
--- /dev/null
+++ b/test/Index/index-kernel-invocation.cpp
@@ -0,0 +1,4 @@
+// RUN: c-index-test -index-file -arch i386 -mkernel %s | FileCheck %s
+
+// CHECK: [indexDeclaration]: kind: function | name: foobar
+void foobar(void);