simplify RTOS-related Keil examples

test/keil/Clean

@@ -0,0 +1,12 @@
+# Do NOT use parenthesis on Windows project dir names
+PROJECTS ?= $(wildcard ../../examples/stm32/nucleo-*-keil-*)
+
+MAKEFILEPATH := $(dir $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST)))
+BATPATH := $(subst /,\,$(MAKEFILEPATH))
+
+all: $(PROJECTS)
+	
+$(PROJECTS): FORCE
+	$(BATPATH)uniclean.bat $(subst /,\,$@)
+
+FORCE:

test/keil/uniclean.bat

@@ -0,0 +1,6 @@
+cd %*
+C:\Keil_v5\UV4\UV4.exe -c device-dashboard.uvprojx -j0
+del /S /Q DebugConfig Listings Objects
+rd /S /Q DebugConfig
+rd /S /Q Listings
+rd /S /Q Objects