[NFC] clang-format basic/test_progvar.cpp (#1528)
[NFC] clang-format basic/test_progvar.cpp (#1528)

Manually reformat the `prog_src` variable which contains kernel code
and disable clang-format on it.

Signed-off-by: Sven van Haastregt <c87899f97800fb9ac456b806e5f84934b5e9c197@arm.com>

Signed-off-by: Sven van Haastregt <c87899f97800fb9ac456b806e5f84934b5e9c197@arm.com>
KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS,KhronosGroup/OpenCL-CTS