main/openssl: change openssldir back to /etc/ssl

this reverts commit 832bbeb0

the previous openssldir of /etc/ssl1.1 causes the statically linked
openssl-static to use the /etc/ssl1.1 path, which then breaks
apk-tools-static (apk.static) use on other distros, as other distros do
not have a ssl1.1->ssl symlink or similar, and apk can only check there
as this openssl is statically linked into it.