hikey: Add hardware/ti/wpan code to hikey device dir

The bluetooth userspace for hikey is related but newer
then the hardware/ti/wpan project in AOSP. Since we have
some hikey specific modifications, import the hikey version
into the device/linaro/hikey directory and tweak the build
to include it.

Code included from:
https://github.com/96boards/android_hardware_ti_wpan.git marshmallow-dev

Change-Id: I6246be43cb287bfd975b099a0e6508046e6d3add
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/wpan/uim/Android.mk b/wpan/uim/Android.mk
new file mode 100644
index 0000000..2beec72
--- /dev/null
+++ b/wpan/uim/Android.mk
@@ -0,0 +1,15 @@
+#Android makefile for uim
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES:= uim.c
+
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/
+
+LOCAL_MODULE_TAGS := eng
+
+LOCAL_MODULE := uim
+
+include $(BUILD_EXECUTABLE)
+