add recovery.fstab as dependency so it triggers rebuild (do not merge)

Make recovery image depend on the fstab file so it gets rebuilt when
fstab changes.  Add support for "emmc" fstab partition type to
edify_generator.

Change-Id: Ic5df4e86c24321bf7d82a644e3e4770352e4f64b

core/Makefile

@@ -652,6 +652,7 @@ $(INSTALLED_RECOVERYIMAGE_TARGET): $(MKBOOTFS) $(MKBOOTIMG) $(MINIGZIP) \
 		$(recovery_initrc) $(recovery_kernel) \
 		$(INSTALLED_2NDBOOTLOADER_TARGET) \
 		$(recovery_build_prop) $(recovery_resource_deps) \
+		$(recovery_fstab) \
 		$(RECOVERY_INSTALL_OTA_KEYS)
 	@echo ----- Making recovery image ------
 	rm -rf $(TARGET_RECOVERY_OUT)

tools/releasetools/edify_generator.py

@@ -22,7 +22,8 @@ class EdifyGenerator(object):
   used from donut onwards."""
 
   # map recovery.fstab's fs_types to mount/format "partition types"
-  PARTITION_TYPES = { "yaffs2": "MTD", "mtd": "MTD", "ext4": "EMMC" }
+  PARTITION_TYPES = { "yaffs2": "MTD", "mtd": "MTD",
+                      "ext4": "EMMC", "emmc": "EMMC" }
 
   def __init__(self, version, info):
     self.script = []