'go get/install' will install binaries into GOBIN when it's set which is not
always same with GOPATH/bin
Fix below error:
$ hack/testExamplesAgainstKustomize.sh HEAD
Installing kustomize HEAD
On linux, and not on remote CI. Running expensive tests.
make: Nothing to be done for '/home/lizj/gosrc/bin/helm'.
Removing kustomize HEAD
rm: cannot remove '/home/lizj/gosrc/bin/kustomize': No such file or directory
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
