Wraps self.cc_path in quotes when building the toolchain defines extraction command. This fixes the issue where microcontroller names containing spaces (e.g., 'Feather M0') would cause the command to be split incorrectly.
Fixes#4894
* Improved file filtering for the Static Analysis feature
* Better handling of legacy "check_patterns" option
* Rename "check_src_filter" to plural form to better represent functionality
* Move to plural forms of filter variables
Alex Lisi