TBR: devtools/jiri-test: use the last part of snapshot manifest as the version string.
TBR: devtools/jiri-test: use the last part of snapshot manifest as the version string.

PresubmitTest: none
Change-Id: I50f3269969e5c5452c06afb068dc0ebeef737031

vanadium/go.devtools,vanadium/go.devtools,vanadium/go.devtools