display-hal: Exclude HWC libs compilation.

This change introduces compilation flag to
compile standalone SDM libs.

Change-Id: I3f8cde50e1806c6cf157364657d77fd9a780d5e3
diff --git a/libgralloc/Android.mk b/libgralloc/Android.mk
index 03da814..5e499b3 100644
--- a/libgralloc/Android.mk
+++ b/libgralloc/Android.mk
@@ -21,10 +21,11 @@
 LOCAL_MODULE_RELATIVE_PATH    := hw
 LOCAL_MODULE_TAGS             := optional
 LOCAL_C_INCLUDES              := $(common_includes) $(kernel_includes)
-LOCAL_SHARED_LIBRARIES        := $(common_libs) libmemalloc libqdMetaData
-LOCAL_SHARED_LIBRARIES        += libqdutils libGLESv1_CM
+LOCAL_SHARED_LIBRARIES        := $(common_libs) libmemalloc libqdMetaData libqdutils
+ifneq ($(TARGET_IS_HEADLESS), true)
+LOCAL_SHARED_LIBRARIES        += libGLESv1_CM
+endif
 LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdgralloc\" -Wno-sign-conversion
-LOCAL_CLANG                   := true
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps) $(kernel_deps)
 LOCAL_SRC_FILES               := gpu.cpp gralloc.cpp framebuffer.cpp mapper.cpp
 LOCAL_COPY_HEADERS_TO         := $(common_header_export_path)
@@ -40,7 +41,6 @@
 LOCAL_C_INCLUDES              := $(common_includes) $(kernel_includes)
 LOCAL_SHARED_LIBRARIES        := $(common_libs) libqdutils libdl
 LOCAL_CFLAGS                  := $(common_flags) -DLOG_TAG=\"qdmemalloc\" -Wno-sign-conversion
-LOCAL_CLANG                   := true
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps) $(kernel_deps)
 LOCAL_SRC_FILES               := ionalloc.cpp alloc_controller.cpp
 LOCAL_COPY_HEADERS            := alloc_controller.h memalloc.h