display: Use single thread for FB post.

To support swapinterval zero a separate thread
was added to do the framebuffer post. Since we
are going to support the WAITFORVSYNC ioctl in HWC,
we can handle the zero swapinterval case there.

Change-Id: I39f960825ca4173f99a9895e0c132b70a7adccab
diff --git a/libgralloc/Android.mk b/libgralloc/Android.mk
index b9eb9e4..e3ca6f9 100644
--- a/libgralloc/Android.mk
+++ b/libgralloc/Android.mk
@@ -26,8 +26,7 @@
 LOCAL_MODULE           := gralloc.$(TARGET_BOARD_PLATFORM)
 LOCAL_MODULE_TAGS      := optional
 LOCAL_CFLAGS           := -DLOG_TAG=\"$(TARGET_BOARD_PLATFORM).gralloc\" \
-                          -DDEBUG_CALC_FPS \
-                          -Wno-missing-field-initializers
+                          -DDEBUG_CALC_FPS -Wno-missing-field-initializers
 LOCAL_SRC_FILES :=  gpu.cpp gralloc.cpp framebuffer.cpp mapper.cpp
 
 ifeq ($(TARGET_USES_POST_PROCESSING),true)