package/openrc: fix uclibc handling

Fix issues spotted by Yann E. Morin in commit
ca169d1d0a5df92e6a1f0850e6969cc525849e6f:
 - BR2_TOOLCHAIN_BUILDROOT_UCLIBC -> BR2_TOOLCHAIN_USES_UCLIBC
 - Add dependency to openrc package and not only to init system

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/openrc/Config.in

@@ -2,6 +2,7 @@ config BR2_PACKAGE_OPENRC
 	bool "openrc"
 	depends on BR2_USE_MMU # fork()
 	depends on !BR2_STATIC_LIBS
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC
 	depends on BR2_INIT_OPENRC
 	select BR2_PACKAGE_BUSYBOX_SHOW_OTHERS # kmod tools
 	select BR2_PACKAGE_KMOD # runtime
@@ -23,7 +24,7 @@ config BR2_PACKAGE_OPENRC
 
 	  https://github.com/OpenRC/openrc
 
-comment "openrc needs a toolchain w/ dynamic library"
+comment "openrc needs a glibc or musl toolchain w/ dynamic library"
 	depends on BR2_USE_MMU
 	depends on BR2_INIT_OPENRC
-	depends on BR2_STATIC_LIBS
+	depends on BR2_STATIC_LIBS && BR2_TOOLCHAIN_USES_UCLIBC

system/Config.in

@@ -105,13 +105,13 @@ config BR2_INIT_OPENRC
 	bool "OpenRC"
 	depends on BR2_USE_MMU
 	depends on !BR2_STATIC_LIBS
-	depends on !BR2_TOOLCHAIN_BUILDROOT_UCLIBC
+	depends on !BR2_TOOLCHAIN_USES_UCLIBC # openrc
 	select BR2_PACKAGE_OPENRC
 	select BR2_PACKAGE_SKELETON_INIT_OPENRC if BR2_ROOTFS_SKELETON_DEFAULT
 
 comment "openrc needs a glibc or musl toolchain w/ dynamic library"
 	depends on BR2_USE_MMU
-	depends on BR2_STATIC_LIBS && BR2_TOOLCHAIN_BUILDROOT_UCLIBC
+	depends on BR2_STATIC_LIBS && BR2_TOOLCHAIN_USES_UCLIBC
 
 # In Buildroot, we decided not to support a split-usr when systemd is
 # used as an init system. This is a design decision, not a systemd