Fix build-thirdparty.sh on latest OpenSuSE
Fix build-thirdparty.sh on latest OpenSuSE

OSTYPE is "linux" vs. "linux-gnu" on latest OpenSuSE. This revision
changes build-thirdparty.sh to a regex match for '^linux' vs. expect a
literal 'linux-gnu'.

Change-Id: I7e690d7c507d2db98e179d6c1fcb3f5b1d722ad0
Reviewed-on: http://gerrit.ent.cloudera.com:8080/2412
Reviewed-by: Adar Dembo <866ca730bfc7f544e3ebce604ceeba4879f23df0@cloudera.com>
Tested-by: jenkins

andrwng/kudu,helifu/kudu,helifu/kudu,cloudera/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,cloudera/kudu,EvilMcJerkface/kudu,cloudera/kudu,EvilMcJerkface/kudu,helifu/kudu,EvilMcJerkface/kudu,helifu/kudu,helifu/kudu,InspurUSA/kudu,InspurUSA/kudu,cloudera/kudu,helifu/kudu,helifu/kudu,InspurUSA/kudu,andrwng/kudu,helifu/kudu,andrwng/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,andrwng/kudu,helifu/kudu,andrwng/kudu,cloudera/kudu,EvilMcJerkface/kudu,cloudera/kudu,InspurUSA/kudu,andrwng/kudu,cloudera/kudu,andrwng/kudu,EvilMcJerkface/kudu,andrwng/kudu,andrwng/kudu