[Mingw-cross-env-list] Disable X11 for gst-plugins-base

[Tony Theodore]

Hi Mark/Volker,

On OSX, the gst-plugins-base build fails with X11 unable to be found.
Configuring without X succeeds, and is probably the "right thing".

diff -r 5bf28532f533 src/gst-plugins-base.mk
--- a/src/gst-plugins-base.mk   Sat Mar 06 14:15:07 2010 +0100
+++ b/src/gst-plugins-base.mk   Mon Mar 08 04:49:41 2010 +1100
@@ -30,6 +30,7 @@
         --disable-check \
         --disable-tests \
         --disable-examples \
+        --disable-x \
         --mandir='$(1)/sink' \
         --docdir='$(1)/sink' \
         --with-html-dir='$(1)/sink'


Tony