Fix repair multiple GOPATH

[Sakurasan]

Fix repair multiple GOPATH
like "E:\CODE\Go\GoPath;E:\CODE\Git\Github\src" can't match pwd

[coveralls]

Coverage decreased (-0.04%) to 25.124% when pulling b1319d8 on Sakurasan:master into e40b4af on kujtimiihoxha:master.

[kujtimiihoxha]

@Sakurasan thanks a lot for the PR, could you please make sure that you also check if kit is run on windows or linux.

The separator is different on these 2 operating systems
https://golang.org/cmd/go/#hdr-GOPATH_environment_variable

The GOPATH environment variable lists places to look for Go code. On Unix, the value is a colon-separated string. On Windows, the value is a semicolon-separated string. On Plan 9, the value is a list.