lxc: use generic autoreconf fixup

Use the generic autoreconf facility to pickup proper variants of
autoconf, automake and libtool.

Remove the unneeded Build/Configure override.

Signed-off-by: Jo-Philipp Wich <jow@openwrt.org>

utils/lxc/Makefile

@@ -19,7 +19,9 @@ PKG_MD5SUM:=4aad3aee84b42faa194e44091d723a3b
 
 PKG_BUILD_DEPENDS:=lua
 PKG_BUILD_PARALLEL:=1
+
 PKG_INSTALL:=1
+PKG_FIXUP:=autoreconf
 
 include $(INCLUDE_DIR)/package.mk
 
@@ -118,11 +120,6 @@ MAKE_FLAGS += \
 	LUA_INSTALL_CMOD="/usr/lib/lua" \
 	LUA_INSTALL_LMOD="/usr/lib/lua"
 
-define Build/Configure
-	( cd $(PKG_BUILD_DIR); ./autogen.sh );
-	$(call Build/Configure/Default)
-endef
-
 
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include/lxc/