minimal.conf: Fully switch to bluez4

We still had bluez-libs being set for bluez-libs rather than bluez4 which
meant that both were being built.

Acked-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Tom Rini <tom_rini@mentor.com>

conf/distro/minimal.conf

@@ -24,7 +24,7 @@ DISTRO_CHECK := "${@bb.data.getVar('DISTRO_VERSION',d,1) or bb.fatal('Remove thi
 # Use bluetooth 4.0
 DISTRO_BLUETOOTH_MANAGER            = "bluez4"
 PREFERRED_PROVIDER_bluez-utils-dbus = "bluez4"
-PREFERRED_PROVIDER_bluez-libs       = "bluez-libs"
+PREFERRED_PROVIDER_bluez-libs       = "bluez4"
 PREFERRED_PROVIDER_bluez-utils      = "bluez4"
 
 # We want images supporting the following features (for task-base)