doc: add meson build to contributing guide
doc: add meson build to contributing guide

Patches has to be validated for meson devtool script for
code and document changes. Updating documentation for meson
build steps in checking Compilation category.

Signed-off-by: Vipin Varghese <b0b9508e3fd3e721e16f75bda9fcfd493661c711@intel.com>
Tested-by: Marko Kovacevic <32a723043e16bf2a3185e32c2e613ae1ee55288f@intel.com>
Acked-by: Marko Kovacevic <32a723043e16bf2a3185e32c2e613ae1ee55288f@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk