Triggered MetadataEvent "SetBRBE" when TOASTER_BRBE variable
is set on bitbake server. This should make buildinfohelper
aware of the build request id, which is used to properly
report build status and failures back to Toaster.
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com> Signed-off-by: Michael Wood <michael.g.wood@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>