Refactoring: rename linker_allocator files

Change-Id: Ifc08e64b3a85205f072b7abab1149c7ab71e2f75
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 593785b..493b035 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -50,7 +50,7 @@
 #include "private/UniquePtr.h"
 
 #include "linker.h"
-#include "linker_allocator.h"
+#include "linker_block_allocator.h"
 #include "linker_debug.h"
 #include "linker_environ.h"
 #include "linker_leb128.h"