test-hwc2: present display

Test: Add "#define HAVE_NO_SURFACE_FLINGER" to
      frameworks/native/libs/gui/BufferQueueCore.cpp.
      Recompile and flash.
      Run "mm" in frameworks/native/services/surfaceflinger/tests/hwc2.
      Push test-hwc2 to device.
      Run "adb root && adb shell stop".
      Run test case. Ex: "./test-hwc2"

Change-Id: I845320afdf635d1716310d1183bcb10515615517
diff --git a/services/surfaceflinger/tests/hwc2/Android.mk b/services/surfaceflinger/tests/hwc2/Android.mk
index 329e124..f7403cf 100644
--- a/services/surfaceflinger/tests/hwc2/Android.mk
+++ b/services/surfaceflinger/tests/hwc2/Android.mk
@@ -35,7 +35,8 @@
     libGLESv2 \
     libui \
     libgui \
-    liblog
+    liblog \
+    libsync
 LOCAL_STATIC_LIBRARIES := \
     libbase \
     libadf \