package/nano: fix tiny build

Since upstream commit
https://git.savannah.gnu.org/cgit/nano.git/commit/configure.ac?id=235f92ce093099cd81f14827ab842bd331132790

--enable-color --enable-nanorc are needed for libmagic support in tiny
builds.

Fixes:
http://autobuild.buildroot.net/results/248/24894e62d6cf89d078959b12e67596c821d64696/

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

package/nano/nano.mk

@@ -29,6 +29,9 @@ endif
 
 ifeq ($(BR2_PACKAGE_NANO_TINY),y)
 NANO_CONF_OPTS += --enable-tiny
+ifeq ($(BR2_PACKAGE_FILE),y)
+NANO_CONF_OPTS += --enable-color --enable-nanorc
+endif
 define NANO_INSTALL_TARGET_CMDS
 	$(INSTALL) -m 0755 $(@D)/src/nano $(TARGET_DIR)/usr/bin/nano
 endef