add vmware_ova to image formats
grub: search for OEM by partition label instead of filesystem label

Probing all filesystem types on all block devices appears to hang
booting Amazon EC2 HVM instances. The console output is unreliably
buffered so there is no information on what the failure actually is. On
the up side we can work around it easily by only searching the GPT which
appears to be safe.
Merge pull request #361 from marineam/grub

grub: search for OEM by partition label instead of filesystem label
setup_board: export paths to kernel source and build directories

The linux-info eclass may trigger a fatal error if it is unable to check
a package's required kernel options. Even when the error isn't fatal the
warnings add a lot of clutter to our build output.
Merge pull request #363 from marineam/linux-info

setup_board: export paths to kernel source and build directories
catalyst: update GCC dependencies before building stage1

When bootstrapping a SDK we need to update GCC dependencies to ensure
the GCC built for stage1 is linked against the same library versions as
those that are included in the stage1. Without this updating the mpc
library just results in a broken stage1.
catalyst: make sure the 'portage' user can write to distfiles and ccache

Adding the update step appears to break permissions on the distfiles
directory. Ensure the portage user is correct and set the permissions on
directories it needs to write to in advance.
Merge pull request #365 from marineam/catalyst

Catalyst fixes
remove autogenerated comment
Merge pull request #364 from vmware/open-vmdk

add vmware_ova to image formats