Windows: makefile doesn't understand path quirk

[djdv]

Previously I have used make from the msys2 project inside of a native Windows command line shell to build IPFS, pull #2808 seems to have broken my ability to build this way. This is more than likely do to the way msys and cygwin convert Windows paths i.e. C:\tmp -> /c/tmp.

Within an msys2 shell I can build again just fine after setting up Go paths, or installing a second copy of Go inside of the msys environment.

I'm not sure how many people this effects but I don't think it's too uncommon for people to use the native shell and natively installed version of Go if they can.

[ghost]

cc @kalabe got a good idea how to fix building on windows? If it's too tricky I think we should revert #2808 and instead reconsider how we're organizing our build.

[djdv]

@lgierth I think @karalabe is the intended name, kalabe is someone else. Pinging for above.

[Kubuxu]

It was reverted, should we close it?

[djdv]

I would say yes, but a separate issue should probably be opened for multiple GOPATH paths if that's still desired.