Fix "unexpected token `(`" and make arguments get passed to servo ins…

…tead of reftest

mk/check.mk

@@ -81,23 +81,23 @@ check-servo: $(foreach lib_crate,$(SERVO_LIB_CRATES),check-servo-$(lib_crate)) s
 
 .PHONY: check-ref-cpu
 check-ref-cpu: reftest
-	@$(call E, check: reftests with CPU rendering (using multiple threads))
+	@$(call E, check: reftests with CPU rendering \(using multiple threads\))
 	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -- -c -t 4 -y 4
 
 .PHONY: check-ref-cpu-sequential
 check-ref-cpu-sequential: reftest
-	@$(call E, check: reftests with CPU rendering (using single thread))
+	@$(call E, check: reftests with CPU rendering \(using single thread\))
 	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -- -c -t 1 -y 1
 
 .PHONY: check-ref-gpu
 check-ref-gpu: reftest
-	@$(call E, check: reftests with GPU rendering (using multiple threads))
-	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -t 4 -y 4
+	@$(call E, check: reftests with GPU rendering \(using multiple threads\))
+	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -- -t 4 -y 4
 
 .PHONY: check-ref-gpu-sequential
 check-ref-gpu-sequential: reftest
-	@$(call E, check: reftests with GPU rendering (using single thread))
-	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -t 1 -y 1
+	@$(call E, check: reftests with GPU rendering \(using single thread\))
+	$(Q)./reftest $(S)src/test/ref/basic.list $(TESTNAME) -- -t 1 -y 1
 
 .PHONY: check-ref
 check-ref: check-ref-cpu check-ref-gpu check-ref-cpu-sequential check-ref-gpu-sequential