display: Export headers

Display headers used by other components should be at a common
location to avoid issues with future changes in paths.

Change-Id: Iaec21206b82dd7dae03e598b9ec46b3e6f1bbf71
diff --git a/libgralloc/Android.mk b/libgralloc/Android.mk
index fb2b0df..a879c5c 100644
--- a/libgralloc/Android.mk
+++ b/libgralloc/Android.mk
@@ -25,7 +25,9 @@
 LOCAL_SHARED_LIBRARIES        += libqdutils libGLESv1_CM
 LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdgralloc\"
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps) $(kernel_deps)
-LOCAL_SRC_FILES               :=  gpu.cpp gralloc.cpp framebuffer.cpp mapper.cpp
+LOCAL_SRC_FILES               := gpu.cpp gralloc.cpp framebuffer.cpp mapper.cpp
+LOCAL_COPY_HEADERS_TO         := $(common_header_export_path)
+LOCAL_COPY_HEADERS            := gralloc_priv.h
 
 include $(BUILD_SHARED_LIBRARY)
 
@@ -38,6 +40,6 @@
 LOCAL_SHARED_LIBRARIES        := $(common_libs) libqdutils libdl
 LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdmemalloc\"
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps) $(kernel_deps)
-LOCAL_SRC_FILES               :=  ionalloc.cpp alloc_controller.cpp
+LOCAL_SRC_FILES               := ionalloc.cpp alloc_controller.cpp
 
 include $(BUILD_SHARED_LIBRARY)