Fix multiple inclusion guards to match new pathnames

Change-Id: Id7735be1d75bc315733b1773fba45c1deb8ace43
diff --git a/compiler/llvm/backend_options.h b/compiler/llvm/backend_options.h
index 924a346..2a08bda 100644
--- a/compiler/llvm/backend_options.h
+++ b/compiler/llvm/backend_options.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ART_SRC_COMPILER_LLVM_BACKEND_OPTIONS_H_
-#define ART_SRC_COMPILER_LLVM_BACKEND_OPTIONS_H_
+#ifndef ART_COMPILER_LLVM_BACKEND_OPTIONS_H_
+#define ART_COMPILER_LLVM_BACKEND_OPTIONS_H_
 
 #include <llvm/Support/CommandLine.h>
 
@@ -47,4 +47,4 @@
 }  // namespace llvm
 }  // namespace art
 
-#endif  // ART_SRC_COMPILER_LLVM_BACKEND_OPTIONS_H_
+#endif  // ART_COMPILER_LLVM_BACKEND_OPTIONS_H_