luarocks: Change luarocks patch to point to lua5.1

The recent lua 5.3 addition broke this.

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

lang/luarocks/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=luarocks
 PKG_VERSION:=2.2.2
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_MIRROR_HASH:=e4cf874c9bce34a5accd41daaf51a3213763b8b6f7f658ca4d13a70a7ddb1c0c

lang/luarocks/patches/01_dont_modify_bin_shebang.diff

@@ -6,7 +6,7 @@ diff -rupN luarocks/Makefile luarocks.new/Makefile
  	do \
  	   sed "1d" src/bin/$$f > src/bin/$$f.bak ;\
 -	   echo "#!$(LUA_BINDIR)/lua$(LUA_SUFFIX)" > src/bin/$$f ;\
-+	   echo "#!/usr/bin/env lua" > src/bin/$$f ;\
++	   echo "#!/usr/bin/env lua5.1" > src/bin/$$f ;\
  	   echo "package.path = [[$(LUADIR)/?.lua;]]..package.path" | sed "s,//,/,g" >> src/bin/$$f ;\
  	   cat src/bin/$$f.bak >> src/bin/$$f ;\
  	   chmod +x src/bin/$$f ;\