package/hiawatha: 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-13/output-1/host/lib/gcc/mips-buildroot-linux-gnu/11.4.0/../../../../mips-buildroot-linux-gnu/bin/ld: CMakeFiles/hiawatha.dir/src/httpauth.c.o: in function `basic_http_authentication':
/home/autobuild/autobuild/instance-13/output-1/build/hiawatha-11.2/src/httpauth.c:334:(.text+0x614): undefined reference to `crypt'

Fixes: b5680f53d60acf8ff6010082f873438a39bd5d97
 - http://autobuild.buildroot.org/results/8054bd47edf613a12b09a9958f78abd5f355f17b

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

package/hiawatha/Config.in

@@ -10,6 +10,7 @@ config BR2_PACKAGE_HIAWATHA
 	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # __sync_*_4 intrisics
 	depends on BR2_TOOLCHAIN_HAS_THREADS
 	depends on !BR2_STATIC_LIBS
+	select BR2_PACKAGE_LIBXCRYPT if BR2_TOOLCHAIN_USES_GLIBC
 	select BR2_PACKAGE_ZLIB
 	help
 	  Hiawatha is a webserver for Unix and has been built with

package/hiawatha/hiawatha.mk

@@ -47,6 +47,10 @@ else
 HIAWATHA_CONF_OPTS += -DENABLE_TLS=OFF
 endif
 
+ifeq ($(BR2_PACKAGE_LIBXCRYPT),y)
+HIAWATHA_DEPENDENCIES += libxcrypt
+endif
+
 ifeq ($(BR2_PACKAGE_LIBXSLT),y)
 HIAWATHA_CONF_OPTS += -DENABLE_XSLT=ON
 HIAWATHA_DEPENDENCIES += libxslt