package/whois: add libxcrypt optional dependency

Fix the following build failure raised since bump of glibc to version
2.39 in commit b5680f53d60acf8ff6010082f873438a39bd5d97:

/home/autobuild/autobuild/instance-12/output-1/host/lib/gcc/riscv32-buildroot-linux-gnu/12.3.0/../../../../riscv32-buildroot-linux-gnu/bin/ld: cannot find -lcrypt: No such file or directory

Fixes: b5680f53d60acf8ff6010082f873438a39bd5d97
 - http://autobuild.buildroot.org/results/b0aaffaf951725186ae078ce101edb24c963c6a3

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/whois/Config.in

@@ -1,6 +1,7 @@
 config BR2_PACKAGE_WHOIS
 	bool "whois"
 	depends on BR2_PACKAGE_BUSYBOX_SHOW_OTHERS
+	select BR2_PACKAGE_LIBXCRYPT if BR2_TOOLCHAIN_USES_GLIBC
 	help
 	  Improved whois client.
 

package/whois/whois.mk

@@ -10,6 +10,7 @@ WHOIS_SOURCE = whois_$(WHOIS_VERSION).tar.xz
 WHOIS_DEPENDENCIES = \
 	host-pkgconf \
 	$(if $(BR2_PACKAGE_LIBIDN2),libidn2) \
+	$(if $(BR2_PACKAGE_LIBXCRYPT),libxcrypt) \
 	$(TARGET_NLS_DEPENDENCIES)
 WHOIS_MAKE_ENV = $(TARGET_MAKE_ENV)
 WHOIS_MAKE_OPTS = CC="$(TARGET_CC)" CFLAGS="$(TARGET_CFLAGS)" \