The go build tool creates working directories under
$TMPDIR for all of its processing. Create a directory
under ${WORKDIR} for this and point TMPDIR at it during
compilation, so that systems that have a relatively
small /tmp filesystems can still compile larger Go
packages.
Signed-off-by: Matt Madison <matt@madison.systems> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Ross Burton <ross.burton@intel.com>