None of the binaries installed by comms/libimobiledevice are actually linked
to gnutls/gcrypt/tasn1, while they are explicitly listed in the LIB_DEPENDS,
remove them. Judging from configure script, GnuTLS is used only when OpenSSL
is explicitly disabled with --disable-openssl; Gentoo ebuild agrees. OpenSSL
is preferred, and is our standard SSL provider. If GnuTLS is required for
some special feature of libimobiledevice, it can be introduced as an OPTION.
While here: stagify the port, use modern LIB_DEPENDS syntax.
Approved by: maintainer (avilla; timeout since May 16th)