The default of EXTRA_OEMAKE is already empty since commit:
OE-Core rev: aeb653861a0ec39ea7a014c0622980edcbf653fa
bitbake.conf: Remove unhelpful default value for EXTRA_OEMAKE
(From OE-Core rev: 408b1f1879e4b90c90f6d139b08d2b6f8e555655)
Signed-off-by: Stefan Müller-Klieser <s.mueller-klieser@phytec.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>