u-boot-common: add B variable
u-boot-common: add B variable

The upstream u-boot recipe in openembedded-core moved the definition of the B
variable from u-boot.inc to u-boot-common.inc. As a result any BSP layer not
including u-boot-common from upstream needs to add this variable to their
recipe so that u-boot builds correctly.

See:
	http://cgit.openembedded.org/openembedded-core/commit/meta/recipes-bsp/u-boot?h=master-next&id=26023b6b0f897842fd98b3e10a8acd5b3ad8f418

Signed-off-by: Trevor Woerner <8835777cd84fba3d7873eabbbe1f2de2d3f25b00@gmail.com>
Signed-off-by: Neil Armstrong <619b324efbf5f7848de055bdc8bef4c0dd7c8ef5@baylibre.com>

superna9999/meta-meson,superna9999/meta-meson,superna9999/meta-meson,superna9999/meta-meson,superna9999/meta-meson