Disable zipwriter from bug 379633 for the time being due to test failures.

r=gavin.sharp

configure.in

@@ -4164,7 +4164,7 @@ MOZ_XSLT_STANDALONE=
 MOZ_XTF=1
 MOZ_XUL=1
 MOZ_XUL_APP=1
-MOZ_ZIPWRITER=1
+MOZ_ZIPWRITER=0
 NS_PRINTING=1
 NECKO_COOKIES=1
 NECKO_DISK_CACHE=1