Fix IAR EWB implementation to work on Linux and tweak its ARM support (#3028)
Fix IAR EWB implementation to work on Linux and tweak its ARM support (#3028)

* Fix path regex in IAR EWB asm parser to work with Linux paths

Currently the regex only supports Windows paths. This commit updates
the regex so that it works with Windows as well as Linux paths.

* Improve ARM support in IAR EWB asm parser
mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer,mattgodbolt/compiler-explorer