[oi-dev] 2682 Supply CC, CXX, CFLAGS, LDFLAGS etc to CONFIGURE_ENV by default

[Alasdair Lumsden]

Hi All,

I have a rather large changeset for review:

https://bitbucket.org/alasdairlumsden/illumos-userland-2682/compare/..illumos/illumos-userland

This abstracts a large amount of unnecessary common autoconf code out. The key files are make-rules/configure.mk and make-rules/shared-macros.mk

I have also updated the CDDL header for each file I've changed as well as updated the digest from sha1 to sha256 (which userland-gate are doing).

Cheers,

Alasdair