mesalib: Update version from 19.1.1 to 19.2.2

The announcments are available on the Web site and the archive of
mesa-announce.

[1]: https://www.mesa3d.org/relnotes/19.2.0.html

mesalib.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION mesalib-19.1.1-0
+# BEE_VERSION mesalib-19.2.2-0
 
 ## this file was created by bee init and should be executed to build a
 ## bee-package. (Additional hints are located at the end of this file.)