package/samba4: add optional dependency to icu & libglib2

icu is used in lib/util/charset/
https://git.samba.org/samba.git/?p=samba.git;a=blob;f=lib/util/charset/wscript_configure;hb=HEAD#l40

libglib2 is used in source3/
https://git.samba.org/samba.git/?p=samba.git;a=blob;f=source3/wscript;hb=HEAD#l1778

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

package/samba4/samba4.mk

@@ -17,8 +17,10 @@ SAMBA4_DEPENDENCIES = \
 	host-e2fsprogs host-flex host-heimdal host-nfs-utils \
 	host-perl host-perl-parse-yapp host-python3 \
 	cmocka e2fsprogs gnutls popt zlib \
+	$(if $(BR2_PACKAGE_ICU),icu) \
 	$(if $(BR2_PACKAGE_LIBAIO),libaio) \
 	$(if $(BR2_PACKAGE_LIBCAP),libcap) \
+	$(if $(BR2_PACKAGE_LIBGLIB2),libglib2) \
 	$(if $(BR2_PACKAGE_READLINE),readline) \
 	$(TARGET_NLS_DEPENDENCIES)
 SAMBA4_CFLAGS = $(TARGET_CFLAGS)