meta-ibm: Remove references to IBMBASE

IBMBASE is only used for pointing at licenses...point at the
licenses in oe-core in meta/files/common-licenses instead. to match the
defacto convention used in other oe layers like meta-openembedded.

Change-Id: Ic8305c920f4a1a37aaf92eef369c32764a0eeb25
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
27 files changed