Tools: Add quotes in ChibiOS waf file

Without these quotes, the ChibiOS build fails if there are spaces in the Ardupilot path, ie ``C:\Stephen Dade\files\ardupilot``

Tools/ardupilotwaf/chibios.py

@@ -297,7 +297,7 @@ def build(bld):
     bld(
         # build hwdef.h and apj.prototype from hwdef.dat. This is needed after a waf clean
         source=bld.path.ant_glob(bld.env.HWDEF),
-        rule="python '${AP_HAL_ROOT}/hwdef/scripts/chibios_hwdef.py' -D '${BUILDROOT}' %s %s" % (bld.env.HWDEF, bld.env.BOOTLOADER_OPTION),
+        rule="python '${AP_HAL_ROOT}/hwdef/scripts/chibios_hwdef.py' -D '${BUILDROOT}' '%s' %s" % (bld.env.HWDEF, bld.env.BOOTLOADER_OPTION),
         group='dynamic_sources',
         target=[bld.bldnode.find_or_declare('hwdef.h'),
                 bld.bldnode.find_or_declare('apj.prototype'),