edify extensions for OTA package installation, part 1

Adds the following edify functions:

  mount unmount format show_progress delete delete_recursive
  package_extract symlink set_perm set_perm_recursive

This set is enough to extract and install the system part of a (full)
OTA package.

Adds the updater binary that extracts an edify script from the OTA
package and then executes it.  Minor changes to the edify core (adds a
sleep() builtin for debugging, adds "." to the set of characters that
can appear in an unquoted string).
diff --git a/updater/Android.mk b/updater/Android.mk
new file mode 100644
index 0000000..2716d48
--- /dev/null
+++ b/updater/Android.mk
@@ -0,0 +1,24 @@
+# Copyright 2009 The Android Open Source Project
+
+LOCAL_PATH := $(call my-dir)
+
+updater_src_files := \
+	install.c \
+	updater.c
+
+#
+# Build the device-side library
+#
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(updater_src_files)
+
+LOCAL_STATIC_LIBRARIES := libedify libmtdutils libminzip libz
+LOCAL_STATIC_LIBRARIES += libcutils libstdc++ libc
+LOCAL_C_INCLUDES += $(LOCAL_PATH)/..
+
+LOCAL_MODULE := updater
+
+LOCAL_FORCE_STATIC_EXECUTABLE := true
+
+include $(BUILD_EXECUTABLE)