Add xu4 tizen test script (#1038)

Add xu4 tizen test script (#1038)

* Add xu4 tizen test script

For example, if you'd like to build & test for tizen xu4, do as
follows:
1. cross build and test
`$ ./run docker_build_tizen_cross.sh ; ./run tizen_xu4_test.sh --test-suite-path=Product/out/test-suite.tar.gz --unittest --verification`
2. gbs build and test
`$ ./run docker_gbs_build.sh ; ./run tizen_xu4_test.sh --rpm-dir=Product/out/rpm --verification --unittest`

Signed-off-by: Chunseok Lee <chunseok.lee@samsung.com>