android-nn-driver: add linkage detection for OCL

Adds solution for linkage detection for OpenCL target.

Test: build
Change-Id: I881cbdd57aaaa108908b985af8aa922085a28cd0

Android.mk

diff --git a/Android.mk b/Android.mk
index 6469cb4..35ef877 100644
--- a/Android.mk
+++ b/Android.mk
@@ -571,8 +571,11 @@
         android.hardware.neuralnetworks@1.3
 
 ifeq ($(ARMNN_INCLUDE_LIBOPENCL),1)
-LOCAL_SHARED_LIBRARIES+= \
-        libOpenCL
+ifeq (,$(realpath $(TOPDIR)vendor/arm/mali/valhall/Android.bp))
+    LOCAL_SHARED_LIBRARIES += libGLES_mali
+else
+    LOCAL_SHARED_LIBRARIES += libOpenCL
+endif
 endif
 
 include $(BUILD_STATIC_LIBRARY)