First version of the keystore service.

The keystore service is protected by the user 'keystore'. Only keystore
user/group can access the key content. All users are able to do the
following commands from shell as well:
  listcerts
  listuserkeys
  installcert
  removecert
  installuserkey
  removeuserkey
diff --git a/cmds/keystore/Android.mk b/cmds/keystore/Android.mk
new file mode 100644
index 0000000..20f4adf
--- /dev/null
+++ b/cmds/keystore/Android.mk
@@ -0,0 +1,21 @@
+ifneq ($(TARGET_SIMULATOR),true)
+
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= \
+    keystore.c commands.c
+
+LOCAL_C_INCLUDES := \
+    $(call include-path-for, system-core)/cutils
+
+LOCAL_SHARED_LIBRARIES := \
+    libcutils
+
+LOCAL_STATIC_LIBRARIES :=
+
+LOCAL_MODULE:= keystore
+
+include $(BUILD_EXECUTABLE)
+
+endif # !simulator))