devtools: expand meson cross compiling test coverage

devtools: expand meson cross compiling test coverage

The default test script covers only default host cc compiler, either gcc or
clang, the fix is to increase the coverage by adding one more to cover
clang and the others for gcc.

Fixes: a55277a788 ("devtools: add test script for meson builds")
Cc: stable@dpdk.org
Signed-off-by: Gavin Hu <gavin.hu@arm.com>
Reviewed-by: Phil Yang <phil.yang@arm.com>
Reviewed-by: Song Zhu <song.zhu@arm.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>