ci: verify GOPATH/bin exists
ci: verify GOPATH/bin exists

Before creating a link in the $GOPATH/bin directory,
ensure the directory exists or create it.

Fixes #902.

Signed-off-by: Salvador Fuentes <1643e95c8f87731315a493a18f5448396bacc6be@intel.com>

chavafg/tests,clearcontainers/tests,devimc/tests,devimc/tests,chavafg/tests,clearcontainers/tests