docker: fix build with go 1.12

Fixed the issue:
| build cache is disabled by GOCACHE=off, but required as of Go 1.12

Issue-ID: INF-4
Signed-off-by: Jackie Huang <jackie.huang@windriver.com>
Change-Id: I2062e2f527bcd537242f96d02f651972ab740d89
1 file changed
tree: e91796ebc354e4d83e0d1c0471d127706f9b8b6e
  1. meta-oran/
  2. .gitreview
  3. INFO.yaml
  4. README.md
README.md

o-ran