intel-gpu-tools: fix some include path problems on android builds

When building within the android tree (specifically in /external)
the compilation fails due to the wrong versions of some header files
getting picked up. This commit adds some include paths to ensure the
correct headers are found

Signed-off-by: Tim Gore <tim.gore@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/tools/Android.mk b/tools/Android.mk
index a957ec1..8ca67f4 100644
--- a/tools/Android.mk
+++ b/tools/Android.mk
@@ -18,6 +18,9 @@
     # Excessive complaining for established cases. Rely on the Linux version warnings.
     LOCAL_CFLAGS += -Wno-sign-compare
 
+    LOCAL_C_INCLUDES = $(LOCAL_PATH)/../lib
+    LOCAL_C_INCLUDES += ${ANDROID_BUILD_TOP}/external/PRIVATE/drm/include/drm
+
     LOCAL_MODULE := $1
     LOCAL_MODULE_TAGS := optional