[Pkg-electronics-devel] Bug#943590: No longer depends on libboost-context and clang

[Jiaxun Yang]

Package: kicad
Version: 5.1.4+dfsg1-2

Upstream had replaced boost::context to a built-in libcontext library in
https://bugs.launchpad.net/kicad/+bug/1658249, so libboost-context in dependency
should be dropped.

Also, after we upgrade to GLM-0.9.9.6 in sid, GCC build is possible again, thus clang is
no longer required too.

After drop these two dependencies, we can now trigger a success build on mips64el platform.