Include additional system header search path

Add system android-base path to header search path (for unique_fd.h)

CRs-Fixed: 1109248
Change-Id: I5cf6113328ac81935b2ea03a4ce66960e15b88fd
diff --git a/common.mk b/common.mk
index c18046d..fadc5d8 100644
--- a/common.mk
+++ b/common.mk
@@ -24,6 +24,7 @@
 
 common_includes += $(display_top)/include
 common_includes += $(display_top)/sdm/include
+common_includes += system/core/base/include
 
 common_header_export_path := qcom/display