*.mk configuration files modified for compatibility with latest version
of Mentor Sourcery CodeBench Lite toolchain
(https://sourcery.mentor.com/GNUToolchain/release2641).
All detected issues fixed.
Merge branch 'master' into codesourcery.
All Matt's advices applied.
Merge pull request #18 from RetroBSD/codesourcery

*.mk files modified for compatibility with Mentor Sourcery CodeBench Lite toolchain