Revert "Make libbcc public."

This reverts commit 80232dd16c0affb2afae01cde6c94abf23ac1ba8.
diff --git a/lib/ExecutionEngine/ObjectLoaderImpl.h b/lib/ExecutionEngine/ObjectLoaderImpl.h
index 0e0f2c1..81756f8 100644
--- a/lib/ExecutionEngine/ObjectLoaderImpl.h
+++ b/lib/ExecutionEngine/ObjectLoaderImpl.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef OBJECT_LOADER_IMPL_H
-#define OBJECT_LOADER_IMPL_H
+#ifndef BCC_EXECUTION_ENGINE_OBJECT_LOADER_IMPL_H
+#define BCC_EXECUTION_ENGINE_OBJECT_LOADER_IMPL_H
 
 #include <cstring>
 
@@ -40,4 +40,4 @@
 
 } // namespace bcc
 
-#endif // OBJECT_LOADER_IMPL_H
+#endif // BCC_EXECUTION_ENGINE_OBJECT_LOADER_IMPL_H