[Development] Handle .tar.gz Mesa archives in build-xorg script correctly.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4134 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/unix/build-xorg b/unix/build-xorg
index 764f14a..98ee458 100755
--- a/unix/build-xorg
+++ b/unix/build-xorg
@@ -97,7 +97,12 @@
     for module in ${modules}; do
         tar jxf ~/.tigervnc-xorg-$XORG_VERSION/${module}.tar.bz2
     done
-    tar jxf ~/.tigervnc-xorg-$XORG_VERSION/Mesa.tar.bz2
+
+    [ -r ~/.tigervnc-xorg-$XORG_VERSION/Mesa.tar.bz2 ] && \
+        tar jxf ~/.tigervnc-xorg-$XORG_VERSION/Mesa.tar.bz2
+    [ -r ~/.tigervnc-xorg-$XORG_VERSION/Mesa.tar.gz ] && \
+        tar zxf ~/.tigervnc-xorg-$XORG_VERSION/Mesa.tar.gz
+
     tar jxf ~/.tigervnc-xorg-$XORG_VERSION/freetype.tar.bz2
     tar jxf ~/.tigervnc-xorg-$XORG_VERSION/xorg-server.tar.bz2
     cp -r $SRCDIR/unix/xserver xserver