The old style bb.data.getVar/setVar API is obsolete. Most of bitbake
doesn't use it but there were some pieces that escaped conversion. This
patch fixes the remaining users mostly in the fetchers.
(Bitbake rev: ff7892fa808116acc1ac50effa023a4cb031a5fc)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>