[PATCH] Remove duplicated BUILD_CC in Makeconfig

[DJ Delorie]

"H.J. Lu" <hjl.tools@gmail.com> writes:
> Remove the second
>
> ifndef BUILD_CC
> BUILD_CC = $(CC)
> endif
>
> in Makeconfig.

LGTM
Reviewed-by: DJ Delorie <dj@redhat.com>