Linux: Use platforms instead of defconfigs

Name of defconfig is automatically evaluated based on platform and arch. Not
as robust, since this script will have to be modified for new defconfigs,
but makes test matrix in Jenkins easier.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Tools: Add script to submit SGE jobs

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Tools: Enable nSIM JIT everywhere

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Tests: Change results directory format

Change from something like $test-$toolchain-$endian-$board-$arch to
$test_$ta_toolchain_$board.

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>
Toolchain: Fix build error when copying logs

Signed-off-by: Anton Kolesov <Anton.Kolesov@synopsys.com>