Add dependencies and configure patches to ebuild

Add a missing dependency atom to DEPEND and a configure patch for
SYMLINK_LIB=no systems.

diff --git a/net-dns/bind/bind-9.12.3_p4.ebuild b/net-dns/bind/bind-9.12.3_p4.ebuild
index 0000000..0000000 100644
--- a/net-dns/bind/bind-9.12.3_p4.ebuild
+++ b/net-dns/bind/bind-9.12.3_p4.ebuild
@@ -61,6 +61,7 @@ DEPEND="
 		!libressl? ( dev-libs/openssl:0[-bindist] )
 		libressl? ( dev-libs/libressl )
 	)
+	berkdb? ( sys-libs/db )
 	mysql? ( dev-db/mysql-connector-c:0= )
 	odbc? ( >=dev-db/unixODBC-2.2.6 )
 	ldap? ( net-nds/openldap )
@@ -108,6 +109,10 @@ pkg_setup() {
 src_prepare() {
 	default
 
+	if [[ "$SYMLINK_LIB" == 'no' ]] ; then
+		eapply "${FILESDIR}/${PN}-9.12.3-symlink-lib-no-lib64-multilib.patch"
+	fi
+
 	# Adjusting PATHs in manpages
 	for i in bin/{named/named.8,check/named-checkconf.8,rndc/rndc.8} ; do
 		sed -i \