Attempt to fix boringssl tests
Attempt to fix boringssl tests

Commit abe256e7951e6d57f8f6b4364ea696eb4ead3852 changed the config target
element from 'cxx' to 'CXX'; catch up accordingly.
Also use a space to offset the template boundary, per convention.

[extended tests]

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/5577)

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