* Turn on building test_gl in travis
* Install packages only on native Linux
* Build test_gl use variable
* Travis - skip OSX system
* Fix test_gl build errors
* Fix test_gl build errors - cast to uintptr_t
* Fix redefinition build issues in travis Xenial build env
The maintenance of the conformance tests is moving to Github.
This commit contains all the changes that have been done in
Gitlab since the first public release of the conformance tests.
Signed-off-by: Kevin Petit kevin.petit@arm.com