Implement multilib SDK support

The attached patch set implements multilib SDK support. This means that when generating an SDK (either by a traditional SDK recipe or the do_populate_sdk task), that support infrastructure for each multilib will be included in the SDK.

Note, this code does -not- change the toolchain. If the generated toolchain does not work properly with the multilib configuration, that will need to be a seperate fix!

This was tested with both the oe-core and our custom Wind River toolchain. Generation passed on the oe-core SDK, but the functionality of the toolchain was not tested. The Wind River toolchain did get properly generated and functioned as expected.

Note: The 0003 patch that affects processing the environment file was agreed to with the other author of the function.

The following changes since commit 06d27cf0fbcc4004e6f456880eca49893c9290bf:

xorg: remove XF86 BigFont extension (2012-10-22 14:57:26 +0100)

are available in the git repository at:
git://git.yoctoproject.org/poky-contrib mhatle/sdk
http://git.yoctoproject.org/cgit.cgi/poky-contrib/log/?h=mhatle/sdk

Mark Hatle (4):
multilib: Add support for cross-canadian multilib packages multilib - crosssdk: Stop building multilib for crosssdk packages
populate_sdk_base: Update extraction script for multilibs
populate_sdk_base: Ensure that the multilib cross-canadian tools are
used

 meta/classes/base.bbclass              |   43 +++++++++++++++++++++++++++++---
 meta/classes/multilib.bbclass          |   20 +++++++++++---
 meta/classes/populate_sdk_base.bbclass |    7 +++--
 meta/lib/oe/classextend.py             |    4 +-
 4 files changed, 60 insertions(+), 14 deletions(-)

1.7.3.4