package/git: add optional support for gettext

git links to libintl if available:

$ output/host/usr/bin/i586-buildroot-linux-uclibc-readelf -a output/target/usr/bin/git | grep NEEDED
 0x00000001 (NEEDED)                     Shared library: [libz.so.1]
 0x00000001 (NEEDED)                     Shared library: [libintl.so.8]
 0x00000001 (NEEDED)                     Shared library: [libc.so.0]

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/git/git.mk

@@ -11,6 +11,10 @@ GIT_LICENSE = GPLv2, LGPLv2.1+
 GIT_LICENSE_FILES = COPYING LGPL-2.1
 GIT_DEPENDENCIES = zlib host-gettext
 
+ifeq ($(BR2_PACKAGE_GETTEXT),y)
+GIT_DEPENDENCIES += gettext
+endif
+
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
 GIT_DEPENDENCIES += openssl
 GIT_CONF_OPTS += --with-openssl