Fix usage of deprecated function CFPropertyListCreateFromXMLData.
Fix usage of deprecated function CFPropertyListCreateFromXMLData.

The function CFPropertyListCreateFromXMLData is deprecated in favor of
the function CFPropertyListCreateWithData that is available since the
10.6 OS X SDK and 4.0 iOS SDK.

BUG=https://bugs.chromium.org/p/google-breakpad/issues/detail?id=675
BUG=569158
R=mark@chromium.org

Review URL: https://codereview.chromium.org/1678063002 .

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