Finding the revision info from compiled binary (gomobile) built with
'go get' is not currently possible. What we can do instead is to check
if the current mobile repository found from GOPATH builds the same
binary by running 'go install -x -n' and checking if it outputs any
output. If so, this command prints out the revision info of the
repository. Otherwise, prints 'unknown'.
Sample output:
./gomobile version
gomobile version +27329c5 Wed Jul 22 19:29:08 2015 -0400 (android,ios);
androidSDK=/Users/hakim/Library/Android/sdk/platforms/android-22
./gomobile version
gomobile version unknown
Change-Id: Idc26c8a1dd3b43cc47a5c15ce130e2b97a460cec
Reviewed-on: https://go-review.googlesource.com/12455
Reviewed-by: David Crawshaw <crawshaw@golang.org>
