Fixed typo that caused incorrect processing of BBEVENTLOG
environment variable. Even if variable is set it was ignored
by bitbake.
(Bitbake rev: 2705b5f59aef4a070e2df2752d27bd04ea747057)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>