AST import for CStyleCastExpr. With this, we can import Cocoa.h into an empty context

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@96648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ASTMerge/Inputs/exprs1.c b/test/ASTMerge/Inputs/exprs1.c
index 42e06de..1c268da 100644
--- a/test/ASTMerge/Inputs/exprs1.c
+++ b/test/ASTMerge/Inputs/exprs1.c
@@ -4,6 +4,7 @@
   E0_Val1 = (17),
   E0_Val2 = (1 << 2),
   E0_Val3 = E0_Val2,
-  E0_Val4 = sizeof(int*)
+  E0_Val4 = sizeof(int*),
+  E0_Val5 = (unsigned int)-1
 };
 
diff --git a/test/ASTMerge/Inputs/exprs2.c b/test/ASTMerge/Inputs/exprs2.c
index 42e06de..1c268da 100644
--- a/test/ASTMerge/Inputs/exprs2.c
+++ b/test/ASTMerge/Inputs/exprs2.c
@@ -4,6 +4,7 @@
   E0_Val1 = (17),
   E0_Val2 = (1 << 2),
   E0_Val3 = E0_Val2,
-  E0_Val4 = sizeof(int*)
+  E0_Val4 = sizeof(int*),
+  E0_Val5 = (unsigned int)-1
 };