meson: Add a fallback for libxml2

3 jobs for libxml2_wrap in 8 minutes and 38 seconds (queued for 14 minutes and 52 seconds)
Status Name Job ID Coverage
  Preparation
passed manifest #50688

00:00:32

 
  Build
passed build fedora x86_64 #50689

00:04:28

 
  Full Builds
passed build android arm64 api28 #50690

00:03:38