Add reference, otherwise, it will always make LibBitcode.size() == 0 in main().
Note: the test above is in Line 252 in llvm-rs-link.cpp.

Change-Id: Idfabdb7c91f28b899c1d95908b0410e56ed13cbb
diff --git a/llvm-rs-link.cpp b/llvm-rs-link.cpp
index fed8b80..1e37593 100644
--- a/llvm-rs-link.cpp
+++ b/llvm-rs-link.cpp
@@ -141,7 +141,7 @@
 
 static bool PreloadLibraries(bool NoStdLib,
                              const std::vector<std::string> &AdditionalLibs,
-                             std::list<MemoryBuffer *> LibBitcode) {
+                             std::list<MemoryBuffer *> &LibBitcode) {
   MemoryBuffer *MB;
 
   LibBitcode.clear();