nunit-2.6.4-bp152.5.20

- Filter out dependency scanner from nunit/tests.

- fake nunit26, nunit-console2, nunit-console26 and nunit-console4
- install pkgconfig to libdir
- fake mono-nunit.pc too

- drop csc-delay-sign.patch, no longer working
- add csc-pub-sign.patch
  * https://github.com/mono/mono/pull/12725
- provides mono-nunit since it was removed since mono-core 6.x

- change pkgconfig-file generation logic - protect it from being broken by OBS source_validators
- nunit.pc pkgconfig-file: typo at Libs section ("r" instead of "-r" for some deps)
- added csc-delay-sign.patch: use delay-sign flag when using roslyn "csc" compiler
  * patch applied only when csc compiler detected
- added support for compiling project with roslyn "csc" compiler (that will replace mcs in mono 5.0):
  * manually sign affected assemlies before adding it to GAC

- avoid the broken release ZIP file https://github.com/nunit/nunitv2/issues/35
- fix the pkgconfig file for MonoDevelop
- build with Debug symbols
- place copies into the global assembly cache

- initial packaging