meta/classes/testimage.bbclass: add testsdk task and enable functionality for it.

- add new testsdk task for meta-toolchain testing.
- enable the get_tests_list method to work with sdk tests.
- add default TEST_SUITES value for meta-toolchain package

NOTE: Original patch made by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Corneliu Stoicescu <corneliux.stoicescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
oeqa/oetest.py: enable sdk testing

- add support for sdk tests in the loadTests and runTests methods
- add new oeSDKTest test object

NOTE: Original patch made by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Corneliu Stoicescu <corneliux.stoicescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
oeqa/utils/targetbuild.py: add support for sdk tests

- Create new abstract class BuildProject that provides basic functionality for a project/package building class
        * contains abstract method _run() that needs to be implemented by all extending classes.
- The old TargetBuildProject class now extends the abstract BuildProjct class
- Introducing new SDKBuildProject that extends the abstract BuildProjct class

NOTE: Original patch made by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Corneliu Stoicescu <corneliux.stoicescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
oeqa/sdk/: add sdk tests for sudoku, iptables and cvs

Add test modules for sdk tests.

NOTE: Original patch made by: Richard Purdie <richard.purdie@linuxfoundation.org>

Signed-off-by: Corneliu Stoicescu <corneliux.stoicescu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
site/common-darwin: Really fix common-darwin typo

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>