Also, along for the ride:
* update from jessie to stretch
* update from Go 1.10 to Go 1.12
* move to multi-stage Dockerfile, including drawterm, reducing image size
* remove the static linking which was resulting in build warnings
* clean up Makefile
Updates golang/go#26872
Updates golang/go#27719
Change-Id: Ic4dc9b8539fb8662c9621c113fa94b70bc7de061
Reviewed-on: https://go-review.googlesource.com/c/build/+/175985
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
This reverts CL 159699 (commit 269e03abe7)
Reason for revert: I now get failures:
bradfitz@gdev:~/src/golang.org/x/build/cmd/coordinator$ ./version.sh
./version.sh: 12: [: missing ]
a377ef91745ef6c4602d363321b0ee7e4a8be5a1-bradfitz-2019-01-30T19:45:32Z
Change-Id: I9e28ac41df327c29628f2b7ac3e0dd20cd31a921
Reviewed-on: https://go-review.googlesource.com/c/160480
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>