Fix the definition of LOCAL_PATH in libusbhost/Android.mk

Change-Id: I870cac2f0e26644e4456743209aa45644d7e494b
Signed-off-by: Kévin PETIT <kevin.petit@arm.com>
diff --git a/libusbhost/Android.mk b/libusbhost/Android.mk
index 9565cc5..acfc020 100644
--- a/libusbhost/Android.mk
+++ b/libusbhost/Android.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-LOCAL_PATH := $(my-dir)
+LOCAL_PATH := $(call my-dir)
 
 # Static library for Linux host
 # ========================================================