gmock: new package

gmock: new package

Inspired by jMock, EasyMock, and Hamcrest, and designed with C++'s
specifics in mind, Google C++ Mocking Framework (or Google Mock for
short) is a library for writing and using C++ mock classes.

Google Mock:

  * lets you create mock classes trivially using simple macros,
  * supports a rich set of matchers and actions,
  * handles unordered, partially ordered, or completely ordered
    expectations,
  * is extensible by users, and
  * works on Linux, Mac OS X, Windows, Windows Mobile, minGW, and
    Symbian.

  http://code.google.com/p/googlemock/

There are both host and target packages. The target one has include
files required to compile the tests and the static libraries required
to link/run them. The host package installs gmock_gen, a Python script
used to generate code mocks.

Notice that GMock 1.7.0 requires the Python 2 host package even if
Python 3 is selected as a target package.

Signed-off-by: Marcelo Barbosa <marcelo.barbosa@datacom.ind.br>
Signed-off-by: Carlos Santos <casantos@datacom.ind.br>
Reviewed-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>