test.mk: re-enable some ext_inter-specific tests

Disabled by mistake when removing the ext_inter experiment flag.

Change-Id: I0ff5681f6b77571871f611144975437534f50698

test/test.mk

diff --git a/test/test.mk b/test/test.mk
index e200913..f8c44f4 100644
--- a/test/test.mk
+++ b/test/test.mk
@@ -195,11 +195,9 @@
 LIBAOM_TEST_SRCS-$(CONFIG_AV1_ENCODER) += blend_a64_mask_test.cc
 LIBAOM_TEST_SRCS-$(CONFIG_AV1_ENCODER) += blend_a64_mask_1d_test.cc
 
-ifeq ($(CONFIG_EXT_INTER),yes)
 LIBAOM_TEST_SRCS-$(CONFIG_AV1_ENCODER) += masked_variance_test.cc
 LIBAOM_TEST_SRCS-$(CONFIG_AV1_ENCODER) += masked_sad_test.cc
 LIBAOM_TEST_SRCS-$(CONFIG_AV1_ENCODER) += av1_wedge_utils_test.cc
-endif
 
 ## Skip the unit test written for 4-tap filter intra predictor, because we
 ## revert to 3-tap filter.