gypsy: fix QA issue by removing EXTRA_OECONF

Addresses QA issue in:

http://lists.openembedded.org/pipermail/openembedded-core/2014-August/095778.html



gypsy-0.9: gypsy: configure was passed unrecognised options: --with-distro [unknown-configure-option]

Signed-off-by: Tom King <ka6sox@gmail.com>
Signed-off-by: Ron Lockwood-Childs <rchilds@vctlabs.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>