hack: TIMEOUT (for controlling test timeout) and forwarding of
BUILDFLAGS to binary/dynbinary.

Docker-DCO-1.1-Signed-off-by: Erik Hollensbe <github@hollensbe.org> (github: erikh)
Merge pull request #8239 from erikh/hack_options

hack: TIMEOUT (for controlling test timeout) and forwarding of BUILDFLAGS to binary/dynbinary.