Add new ./configure target & xtarget: arm*-netbsd*-eabi*
Example GNU triplets:
evbarm 7.0 NetBSD ignored arm arm-unknown-netbsdelf7.0
evbarm 7.0 NetBSD ignored armeb armeb-unknown-netbsdelf7.0
evbarm 7.0 NetBSD ignored earmv6 armv6-unknown-netbsdelf7.0-eabi
evbarm 7.0 NetBSD ignored earmv6eb armv6eb-unknown-netbsdelf7.0-eabi
evbarm 7.0 NetBSD ignored earmv6hf armv6-unknown-netbsdelf7.0-eabihf
evbarm 7.0 NetBSD ignored earmv6hfeb armv6eb-unknown-netbsdelf7.0-eabihf
evbarm 7.0 NetBSD ignored earmv7 armv7-unknown-netbsdelf7.0-eabi
evbarm 7.0 NetBSD ignored earmv7eb armv7eb-unknown-netbsdelf7.0-eabi
evbarm 7.0 NetBSD ignored earmv7hf armv7-unknown-netbsdelf7.0-eabihf
evbarm 7.0 NetBSD ignored earmv7hfeb armv7eb-unknown-netbsdelf7.0-eabihf
-- http://git.savannah.gnu.org/cgit/config.git/tree/testsuite/config-guess.data
For now support just EABI targets (available since ARMv4).