Remove Unix standard settings for Solaris 12, so we don't exclude all

features added between XPG2 & XPG7, now that these are exposed by default.

To send upstream, need to adjust to right version for each OS level

--- glib-2.46.0/configure.ac 2015-09-24 23:04:41.862038047 -0700

+++ glib-2.46.0/configure.ac 2015-09-24 23:15:21.170129554 -0700

@@ -1112,7 +1112,5 @@

case $host in

*-*-solaris* )

- AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, Needed to get declarations for msg_control and msg_controllen on Solaris)

- AC_DEFINE(_XOPEN_SOURCE, 2, Needed to get declarations for msg_control and msg_controllen on Solaris)

AC_DEFINE(__EXTENSIONS__, 1, Needed to get declarations for msg_control and msg_controllen on Solaris)

;;

esac