Make CROSS_COMPILE another supported "make variable" in Configure
Make CROSS_COMPILE another supported "make variable" in Configure

No more special casing for that one, and this means it gets displayed
by 'perl configdata.pm --make-variables' among all the others.

Reviewed-by: Rich Salz <c04971a99e5a9ee80eaab4b1deb37e845b0bd697@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5247)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl