[llvm-pdbdump] Add some tests for llvm-pdbdump.

This adds only a very basic set of tests that dump a few
functions and object files.

Differential Revision: http://reviews.llvm.org/D7656
Reviewed By: David Blaikie

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230083 91177308-0d34-0410-b5e6-96231b3b80d8

test/DebugInfo/PDB/Inputs/empty.cpp

@@ -0,0 +1,7 @@
+// Build with "cl.exe /Zi empty.cpp /link /debug /nodefaultlib /entry:main"
+
+void *__purecall = 0;
+
+int main() {
+  return 42;
+}