tests/checkasm/x86/Makefile: Use ASMSTRIPFLAGS for asm

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

tests/checkasm/x86/Makefile

@@ -3,4 +3,4 @@ CHECKASMOBJS-$(HAVE_YASM) += x86/checkasm.o
 tests/checkasm/x86/%.o: tests/checkasm/x86/%.asm
 	$(DEPYASM) $(YASMFLAGS) -I $(<D)/ -M -o $@ $< > $(@:.o=.d)
 	$(YASM) $(YASMFLAGS) -I $(<D)/ -o $@ $<
-	-$(STRIP) $(STRIPFLAGS) $@
+	-$(STRIP) $(ASMSTRIPFLAGS) $@