allow flashing sparse images
if the image has the right magic bytes to be a sparse image,
use simg2img to flash the image
create a rule to make a fully dynamic simg2img which results in a
much smaller increase in gzip ramdisk size (2KB vs 40KB)
Change-Id: I1b0f6bc127da46103888b1154a9bddd8ac02c01d
diff --git a/simg2img/Android.mk b/simg2img/Android.mk
new file mode 100644
index 0000000..74755e7
--- /dev/null
+++ b/simg2img/Android.mk
@@ -0,0 +1,14 @@
+LOCAL_PATH := system/core/libsparse
+
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := simg2img.c \
+ sparse_crc32.c
+LOCAL_MODULE := simg2img_twrp
+LOCAL_MODULE_STEM := simg2img
+LOCAL_MODULE_PATH := $(TARGET_RECOVERY_ROOT_OUT)/sbin
+LOCAL_MODULE_TAGS := optional
+LOCAL_SHARED_LIBRARIES := \
+ libsparse \
+ libz
+LOCAL_CFLAGS := -Werror
+include $(BUILD_EXECUTABLE)