Add third_party/apple_cctools containing virgin upstream code

Add third_party/apple_cctools containing virgin upstream code.

getsectionbyname() and getsegmentbyname() do not exist prior to Mac OS X
10.7. These functions are used by util_test MachOImageReader.*. For 10.6
SDK and runtime compatibility, Crashpad needs its own implementations of
these functions.

This checkin contains unmodified copies of the upstream code. A
subsequent checkin will contain the local modifications, which will trim
out all unnecessary portions. This is being committed in two parts to
make it easier to see what changes are being made to the upstream files.

R=rsesek@chromium.org

Committed: https://chromium.googlesource.com/crashpad/crashpad/+/24fc801715a7bf9c91f34623a9f845afad97e6d7

[Mark Mentovai, 2014-09-11 15:38:36]

mark@chromium.org changed reviewers:
+ rsesek@chromium.org

[Robert Sesek, 2014-09-11 18:44:44]

No GYP file? Otherwise, stamp LGTM.

[Mark Mentovai, 2014-09-11 18:55:02]

There’s no .gyp file because it doesn’t build in our environment as-is in its
upstream form. The next commit will have a .gyp file for this, along with
trimming it down so that it works here.

[Mark Mentovai, 2014-09-11 19:11:54]

Committed patchset #1 (id:1) manually as 24fc801 (presubmit successful).