core: respect PYOPT in firmware build

core/Makefile

@@ -109,7 +109,7 @@ build_reflash: ## build reflash firmware + reflash image
 	dd if=build/bootloader/bootloader.bin of=$(REFLASH_BUILD_DIR)/sdimage.bin bs=1 seek=49152
 
 build_firmware: res build_cross ## build firmware with frozen modules
-	$(SCONS) CFLAGS="$(CFLAGS)" PRODUCTION="$(PRODUCTION)" BITCOIN_ONLY="$(BITCOIN_ONLY)" $(FIRMWARE_BUILD_DIR)/firmware.bin
+	$(SCONS) CFLAGS="$(CFLAGS)" PRODUCTION="$(PRODUCTION)" PYOPT="$(PYOPT)" BITCOIN_ONLY="$(BITCOIN_ONLY)" $(FIRMWARE_BUILD_DIR)/firmware.bin
 
 build_unix: res ## build unix port
 	$(SCONS) CFLAGS="$(CFLAGS)" $(UNIX_BUILD_DIR)/micropython $(UNIX_PORT_OPTS) BITCOIN_ONLY="$(BITCOIN_ONLY)"