add update and verify makefile

[calvin0327]

Signed-off-by: calvin0327 wen.chen@daocloud.io

What type of PR is this?
/kind feature

What this PR does / why we need it:
add makefile command:

make update

above command exec workflow include:

1. update ./vendor dir
2. update CRD files of ./config/crds dir
3. update ./pkg/generate dir and ./pkg/api/*/zz_generated*.go files
4. update import aliases of all go files
5. format go file by gofmt

make verify

above command verify the files generated by make update.

Which issue(s) this PR fixes:
Fixes # #7

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE