Fix SpaceBeforeBrace linter with lonesome curly

If a curly brace were placed on its own line with no indentation, the
`SpaceBeforeBrace` linter would incorrectly report a lint.

Fix it by checking if the character before the brace is a space _or_ a
newline.

Change-Id: I404b4b1d128a8dbc592bbf8772e9eeed50077e2c
Reviewed-on: http://gerrit.causes.com/40448
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane.dasilva@brigade.com>