Fix compiler error for GLOBAL_MOTION+WARPED_MOTION

Fix the logical OR computation in .mk file. Otherwise, when both
experiments are on, the output of $(filter... will be two 'yes',
which will cause missing library issue.

Change-Id: I53c44e925dc9ea77c7467217c20e4f1bc7e20fc3

av1/av1_common.mk

diff --git a/av1/av1_common.mk b/av1/av1_common.mk
index 9976e7a..26ef9c5 100644
--- a/av1/av1_common.mk
+++ b/av1/av1_common.mk
@@ -82,7 +82,7 @@
 AV1_COMMON_SRCS-yes += common/av1_convolve.h
 AV1_COMMON_SRCS-$(CONFIG_LOOP_RESTORATION) += common/restoration.h
 AV1_COMMON_SRCS-$(CONFIG_LOOP_RESTORATION) += common/restoration.c
-ifeq (yes,$(filter yes,$(CONFIG_GLOBAL_MOTION) $(CONFIG_WARPED_MOTION)))
+ifeq (yes,$(filter $(CONFIG_GLOBAL_MOTION) $(CONFIG_WARPED_MOTION),yes))
 AV1_COMMON_SRCS-yes += common/warped_motion.h
 AV1_COMMON_SRCS-yes += common/warped_motion.c
 endif