doc: add requirements for x32 ABI
doc: add requirements for x32 ABI

Add requirements about compiler and distribution support.

Signed-off-by: Daniel Mrzyglod <998f22cc3a6ac3535545292178d834b83a4e2a87@intel.com>
Acked-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>

john-mcnamara-intel/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,msune/dpdk,mixja/dpdk,msune/dpdk,venkynv/dpdk-mirror,tsphillips/dpdk-fork,venkynv/dpdk-mirror,venkynv/dpdk-mirror,tsphillips/dpdk-fork,tsphillips/dpdk-fork,mixja/dpdk,mixja/dpdk,msune/dpdk,msune/dpdk,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork