Add regression-test for tools

tools/Makefile

@@ -1,4 +1,4 @@
-all: codeprop tunslip
+all: tunslip
 
 gitclean:
 	@git clean -d -x -n ..
@@ -20,4 +20,4 @@ cleantargets:
 	@rm -f -v ${addprefix ../examples/*/*., ${shell ls ../platform/}}
 	@rm -f -v ${addprefix ../examples/*/*/*., ${shell ls ../platform/}}
 cleandone:
-	@echo ${info All done!}
+	@echo ${info All done!}

tools/stm32w/Makefile

@@ -0,0 +1,25 @@
+ifndef HOST_OS
+  ifeq ($(OS),Windows_NT)
+    HOST_OS := Windows
+  else
+    HOST_OS := $(shell uname)
+  endif
+endif
+
+ifeq ($(HOST_OS),Windows)
+  SERIALDUMP = serialdump-windows
+endif
+
+ifeq ($(HOST_OS),Darwin)
+  SERIALDUMP = serialdump-macos
+endif
+
+ifndef SERIALDUMP
+  # Assume Linux
+  SERIALDUMP = serialdump-linux
+endif
+
+all:	$(SERIALDUMP)
+
+$(SERIALDUMP):	serialdump.c
+	$(CC) -O2 -o $@ $<