Staticly link Linux binaries
Staticly link Linux binaries

- Since we do not know the full ramifications of using 'CGO_ENABLE=0',
  manually telling the linker to be static will have to do. This makes
  the binary now work on alpine.

[Finishes #116761341, #116760875] (GitHub issue #807, #808)

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli