mg: update to 6.7

Fixes GCC10 compilation.

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

utils/mg/Makefile

@@ -5,12 +5,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mg
-PKG_VERSION:=6.6
+PKG_VERSION:=6.7
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/ibara/mg/tar.gz/$(PKG_NAME)-$(PKG_VERSION)?
-PKG_HASH:=e8440353da1a52ec7d40fb88d4f145da49c320b5ba31daf895b0b0db5ccd0632
+PKG_HASH:=899681ddd93525e0341b8e9239911c1a93c1185f61372625463c116ff43e920b
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_NAME)-$(PKG_VERSION)
 
 PKG_MAINTAINER:=Hirokazu MORIKAWA <morikw2@gmail.com>