parse_build_log.pl: fixed trivial grammatical error
parse_build_log.pl: fixed trivial grammatical error

Change-Id: Idfd9076f4772790a449f6105375f4b2de2eda9a9
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Toby Tomkins <23ead35e36f9890dd80f47acf9947179b1bd7fe7@nokia.com>

tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa,tsarajar/qtqa