gammu: add back nls.mk

Because glib2 uses libintl, this is needed to prevent a linking error.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/gammu/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=gammu
 PKG_VERSION:=1.41.0
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=https://dl.cihar.com/gammu/releases
@@ -24,6 +24,7 @@ CMAKE_INSTALL:=1
 PKG_BUILD_PARALLEL:=1
 
 include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/nls.mk
 include $(INCLUDE_DIR)/cmake.mk
 
 define Package/gammu