Expand include pathnames and add bd root path

Hopefully this will squash the sem_t semaphore_t collision
diff --git a/btcore/Android.mk b/btcore/Android.mk
index 8426bc0..b5d3340 100644
--- a/btcore/Android.mk
+++ b/btcore/Android.mk
@@ -22,7 +22,8 @@
 
 LOCAL_C_INCLUDES := \
     $(LOCAL_PATH)/include \
-    $(LOCAL_PATH)/../osi/include
+    $(LOCAL_PATH)/../osi/include \
+    $(LOCAL_PATH)/..
 
 LOCAL_SRC_FILES := \
     src/bdaddr.c \