Implement basic support for merging function declarations across
translation units.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95794 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/ASTMerge/Inputs/function1.c b/test/ASTMerge/Inputs/function1.c
new file mode 100644
index 0000000..b999123
--- /dev/null
+++ b/test/ASTMerge/Inputs/function1.c
@@ -0,0 +1,6 @@
+void f0(int);
+void f1(int, float);
+void f2();
+void f3(void);
+void f4(int, int);
+