display-hal: Exclude HWC libs compilation.

This change introduces compilation flag to
compile standalone SDM libs.

Change-Id: I3f8cde50e1806c6cf157364657d77fd9a780d5e3
diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index e9cdc73..eded50f 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -39,7 +39,7 @@
 #include <qdMetaData.h>
 #include <utils/Singleton.h>
 #include <utils/Mutex.h>
-
+#include <algorithm>
 
 #ifdef VENUS_COLOR_FORMAT
 #include <media/msm_media_info.h>