lemon.cmake: - Explicitly disable GLPK support - Added a comment about (lack of) clang support for this package.
lemon.cmake:
- Explicitly disable GLPK support
- Added a comment about (lack of) clang support for this package.

janelia-flyem/buildem,janelia-flyem/buildem,chaubold/buildem,chaubold/buildem,chaubold/buildem