Another LLVM3.5 compilation fix.
Compilation fix for LLVM3.5 caused by the removal of sys::fs::F_Binary.
The commit that caused this is r202052.
Fix more LLVM3.5 compilation issues.
Fix segfault under LLVM3.5 . I forgot to release ownership of the
MemoryBuffer from the std::unique_ptr when getLazyBitcodeModule()
succesfully takes ownership.