Rename compiler_llvm CompilationUnit to LlvmCompilationUnit

Also fixed stray ART_TEST_CFLAGS to LOCAL_CFLAGS
Also fixed relative includes

Tried to change CompilationUnit to reference LlvmCompilationUnit, but
that causes issues because of the split libart-compiler
libart-compiler-llvm.

Change-Id: I7a490f339add6355a20c1cedae858ccf6967a6aa
diff --git a/src/compiler/codegen/mir_to_gbc.cc b/src/compiler/codegen/mir_to_gbc.cc
index 2657b79..f67f760 100644
--- a/src/compiler/codegen/mir_to_gbc.cc
+++ b/src/compiler/codegen/mir_to_gbc.cc
@@ -27,9 +27,9 @@
 #include <llvm/Support/Casting.h>
 #include <llvm/Support/InstIterator.h>
 
-#include "../compiler_internals.h"
-#include "local_optimizations.h"
 #include "codegen_util.h"
+#include "compiler/compiler_internals.h"
+#include "local_optimizations.h"
 #include "ralloc_util.h"
 
 static const char* kLabelFormat = "%c0x%x_%d";