libs.mk: relocate TEST_INTRA_PRED_SPEED_OBJS init

allows the visual studio project to be generated

Change-Id: I89a8440fb0bcaef11ff89dd967aa37bfe200758d

libs.mk

diff --git a/libs.mk b/libs.mk
index 0f87a8a..0ca8379 100644
--- a/libs.mk
+++ b/libs.mk
@@ -373,6 +373,7 @@
 
 TEST_INTRA_PRED_SPEED_BIN=./test_intra_pred_speed$(EXE_SFX)
 TEST_INTRA_PRED_SPEED_SRCS=$(addprefix test/,$(call enabled,TEST_INTRA_PRED_SPEED_SRCS))
+TEST_INTRA_PRED_SPEED_OBJS := $(sort $(call objs,$(TEST_INTRA_PRED_SPEED_SRCS)))
 
 libvpx_test_srcs.txt:
 	@echo "    [CREATE] $@"
@@ -486,7 +487,6 @@
               $(LIBVPX_TEST_OBJS) \
               -L. -lvpx -lgtest $(extralibs) -lm))
 
-TEST_INTRA_PRED_SPEED_OBJS := $(sort $(call objs,$(TEST_INTRA_PRED_SPEED_SRCS)))
 ifneq ($(strip $(TEST_INTRA_PRED_SPEED_OBJS)),)
 $(TEST_INTRA_PRED_SPEED_OBJS) $(TEST_INTRA_PRED_SPEED_OBJS:.o=.d): CXXFLAGS += $(GTEST_INCLUDES)
 OBJS-yes += $(TEST_INTRA_PRED_SPEED_OBJS)