hwc: implement hwcomposer HAL

This is a preliminary implementation which uses the proper ioctls to
talk to the display controller, but currently places every layer in a
framebuffer.

Change-Id: I2847d3ed69e348c763ad974b2f0ab8133dd5d6cc
Signed-off-by: Greg Hackmann <ghackmann@google.com>
diff --git a/exynos5.mk b/exynos5.mk
index 9483187..7a1fc97 100644
--- a/exynos5.mk
+++ b/exynos5.mk
@@ -25,3 +25,7 @@
 PRODUCT_PACKAGES += \
 	libstagefrighthw \
 	libExynosOMX_Core
+
+# hw composer HAL
+PRODUCT_PACKAGES += \
+	hwcomposer.exynos5