nine: the .pc file should not follow mesa version

The version provided by it should be the same as the one
provided/handled by the module. Add the missing tiny version.

Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: David Heidelberg <david@ixit.cz>
diff --git a/configure.ac b/configure.ac
index 882898f..1d9d015 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2093,6 +2093,8 @@
 
 AC_SUBST([NINE_MAJOR], 1)
 AC_SUBST([NINE_MINOR], 0)
+AC_SUBST([NINE_TINY], 0)
+AC_SUBST([NINE_VERSION], "$NINE_MAJOR.$NINE_MINOR.$NINE_TINY")
 
 AC_SUBST([VDPAU_MAJOR], 1)
 AC_SUBST([VDPAU_MINOR], 0)