android: softpipe: Set nir headers include path

Set the missing nir/ headers include path, otherwise AOSP
build will fail.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Change-Id: Ifbeeafc2b239e54794acb889d8dcbf554affca17
diff --git a/src/gallium/drivers/softpipe/Android.mk b/src/gallium/drivers/softpipe/Android.mk
index 7508f5a..3906ef6 100644
--- a/src/gallium/drivers/softpipe/Android.mk
+++ b/src/gallium/drivers/softpipe/Android.mk
@@ -31,6 +31,10 @@
 LOCAL_SRC_FILES := \
 	$(C_SOURCES)
 
+LOCAL_C_INCLUDES := \
+	$(call generated-sources-dir-for,STATIC_LIBRARIES,libmesa_nir,,)/nir \
+	$(MESA_TOP)/src/compiler/nir
+
 LOCAL_MODULE := libmesa_pipe_softpipe
 LOCAL_LICENSE_KINDS := SPDX-license-identifier-MIT
 LOCAL_LICENSE_CONDITIONS := notice