sunxi-tools: add inherit pkgconfig
sunxi-tools: add inherit pkgconfig

sunxi-tools requires pkg-config native binary
which may be missing wihen pkgconfig class
is not inherited.

Signed-off-by: Dariusz Pelowski <dbaf3602f85143b55accd2bc75e0b78f834b42c6@gmail.com>

net147/meta-sunxi,net147/meta-sunxi,linux-sunxi/meta-sunxi,linux-sunxi/meta-sunxi,twoerner/meta-sunxi,linux-sunxi/meta-sunxi,twoerner/meta-sunxi