Fix loongarch64 build and clean up include paths

Fix loongarch64 build and clean up include paths

Fixes #30418

Add ../crypto to INCLUDE[p_ossltest].
Remove useless .. from various INCLUDE[] - this was necessary when e_os.h was
placed in the SRCDIR root.

Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Paul Dale <paul.dale@oracle.com>
Reviewed-by: Norbert Pocs <norbertp@openssl.org>
Reviewed-by: Neil Horman <nhorman@openssl.org>
MergeDate: Tue Mar 31 15:51:53 2026
(Merged from https://github.com/openssl/openssl/pull/30536)

(cherry picked from commit 2172e0c098cd8e2f24a0d5f3cf36b6433bf9ef35)