Gitignore NEC diagnostic files

This updates .gitignore to ignore the *.L files generated by the NEC Fortran compiler (nfort).

added 1 commit

• ab7a1f21 - Added COPYING in gitignore_nec from libmtime-2.0.0-rc

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added 6 commits

• ab7a1f21...7aaf3113 - 5 commits from branch libmtime-2.0.0-rc
• 246fdd55 - Merge branch 'libmtime-2.0.0-rc' into 'gitignore_nec'

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merged

mentioned in commit 937bf177