configure.ac: Check for expat21 if expat is not found.
authorVinson Lee <vlee@freedesktop.org>
Sat, 5 Aug 2017 20:31:50 +0000 (13:31 -0700)
committerVinson Lee <vlee@freedesktop.org>
Thu, 17 Aug 2017 07:11:27 +0000 (00:11 -0700)
commita0ed82947c83a64ff8b85bca638e137e5466bd98
tree428a666b3680ab5b7adaa005b7ca530e55ae4e8c
parent2c5717a4de2a2406a7e155de641921571a3910c7
configure.ac: Check for expat21 if expat is not found.

Fixes build error on CentOS 6.9.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102052
Fixes: 5c007203b73d ("configure.ac: drop manual detection of expat header/library")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
configure.ac