package/sysvinit: add optional dependency to libxcrypt

When glibc was bumped to version 2.39 in commit
b5680f53d60acf8ff6010082f873438a39bd5d97 it removed the deprecated
libcrypt support.

As glibc's libcrypt was providing sysvinit's libcrypt dependency this
broke the sysvinit build using glibc version 2.39.

To fix this select the libxcrypt dependency to sysvinit when using a
glibc toolchain and add the dependency if selected.

Fixes:
http://autobuild.buildroot.net/results/3a9/3a99389bd7b6db7f9467b34c7bead1d58ce5a18d/

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/sysvinit/Config.in

@@ -3,6 +3,7 @@ config BR2_PACKAGE_SYSVINIT
 	depends on BR2_USE_MMU # fork()
 	depends on BR2_INIT_SYSV
 	depends on BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
+	select BR2_PACKAGE_LIBXCRYPT if BR2_TOOLCHAIN_USES_GLIBC
 	help
 	  System V style implementation of /sbin/init, parent of all
 	  processes

package/sysvinit/sysvinit.mk

@@ -18,6 +18,10 @@ SYSVINIT_DEPENDENCIES += libselinux
 SYSVINIT_MAKE_OPTS += WITH_SELINUX="yes"
 endif
 
+ifeq ($(BR2_PACKAGE_LIBXCRYPT),y)
+SYSVINIT_DEPENDENCIES += libxcrypt
+endif
+
 define SYSVINIT_BUILD_CMDS
 	$(TARGET_CONFIGURE_OPTS) $(MAKE) $(SYSVINIT_MAKE_OPTS) -C $(@D)/src
 endef