zclsyntax: run stringer after other generators

stringer is more sensitive to certain errors than other generators, so
by running it last we give the other generators a chance to get things
straight before we ask stringer to run.

zcl/zclsyntax/generate.go

@@ -4,3 +4,4 @@ package zclsyntax
 //go:generate ruby unicode2ragel.rb --url=http://www.unicode.org/Public/9.0.0/ucd/DerivedCoreProperties.txt -m UnicodeDerived -p ID_Start,ID_Continue -o unicode_derived.rl
 //go:generate ragel -Z scan_tokens.rl
 //go:generate gofmt -w scan_tokens.go
+//go:generate stringer -type TokenType -output token_type_string.go

zcl/zclsyntax/token.go

@@ -21,8 +21,6 @@ type Tokens []Token
 // TokenType is an enumeration used for the Type field on Token.
 type TokenType rune
 
-//go:generate stringer -type TokenType -output token_type_string.go
-
 const (
 	// Single-character tokens are represented by their own character, for
 	// convenience in producing these within the scanner. However, the values