www/chromium: Fix build on aarch64

arm64 doesn't have elf_aux_info and FreeBSD doesn't support getauxval.
For both boringssl and zlib disable the feature checking until we have
a way to expose those feature to the user.
Remove a patch (patch-third__party_boringssl_src_crypto_cpu-aarch64-linux.c) which is a no op
as all the code in under OPENSSL_LINUX which isn't defined.

Reviewed by: cpm (earier version), bapt (earlier version)
Approved by: bapt (mentor, implicit)