IMPALA-5905: build-all-flag-combinations addendum
IMPALA-5905: build-all-flag-combinations addendum

Running the script under Jenkins revealed a couple of issues that I'd
missed

Change-Id: Iaa97a981846a2397ecabb90b9039ba61c2c7af4e
Reviewed-on: http://gerrit.cloudera.org:8080/8061
Reviewed-by: Philip Zeyliger <3ba3974e96044dcde818e6310ed799abe10671d4@cloudera.com>
Reviewed-by: Matthew Jacobs <df2fa7c39d141dc5dc5589fed74180e757ed6c9a@cloudera.com>
Tested-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala