Change Linux sysroot creator scripts to use XZ compression.

build/linux/sysroot_scripts/build_and_upload.py

 #!/usr/bin/env python
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Automates running BuildPackageLists, BuildSysroot, and
 UploadSysroot for each supported arch of each sysroot creator.
 """
 
 import glob
@@ skipping 26 matching lines @@
 def build_and_upload(script_path, distro, release, arch, lock):
   # TODO(thomasanderson):  Find out which revision 'git-cl upload' uses to
   # calculate the diff against and use that instead of HEAD.
   script_dir = os.path.dirname(os.path.realpath(__file__))
   revision = get_proc_output(['git', '-C', script_dir, 'rev-parse', 'HEAD'])
 
   run_script([script_path, 'UpdatePackageLists%s' % arch])
   run_script([script_path, 'BuildSysroot%s' % arch])
   run_script([script_path, 'UploadSysroot%s' % arch, revision])
 
-  tarball = '%s_%s_%s_sysroot.tgz' % (distro, release, arch.lower())
-  tgz_path = os.path.join(script_dir, "..", "..", "..", "out", "sysroot-build",
-                          release, tarball)
-  sha1sum = sha1sumfile(tgz_path)
+  tarball = '%s_%s_%s_sysroot.tar.xz' % (distro, release, arch.lower())
+  tarxz_path = os.path.join(script_dir, "..", "..", "..", "out",
+                            "sysroot-build", release, tarball)
+  sha1sum = sha1sumfile(tarxz_path)
   sysroot_dir = '%s_%s_%s-sysroot' % (distro, release, arch.lower())
 
   sysroot_metadata = {
       'Revision': revision,
       'Tarball': tarball,
       'Sha1Sum': sha1sum,
       'SysrootDir': sysroot_dir
   }
   with lock:
     with open(os.path.join(script_dir, 'sysroots.json'), 'rw+') as f:
@@ skipping 27 matching lines @@
   failures = 0
   for name, proc in procs:
     if proc.exitcode:
       failures += 1
     status = "FAILURE" if proc.exitcode else "SUCCESS"
     print "%s sysroot creation\t%s" % (name, status)
   return failures
 
 if __name__ == '__main__':
   sys.exit(main())