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Now that appropriate socket headers have been found for newlib,
two things need to be done before socket implementation work can begin.
First, wrappers must be added to kernel_wrap_newlib. Second, some
helper functions provided by glibc need to be implemented. This CL
does both. In particular, inet_ntoa() and inet_ntop() have been
implemented, allowing the conversion of IPv4 and IPv6 addresses
to strings.

NOTRY=true
BUG=None
TEST=None
R=noelallen@chromium.org,bradnelson@google.com

Review URL: https://chromiumcodereview.appspot.com/21610003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@215937 0039d316-1c4b-4281-b951-d872f2087c98