Modify Parser for Winodws and i386 32bit platform

PingCAP不支持也不打算支持32位平台，本项目修改一些底层代码避开在32位平台上的overflow

Discuss

Name		Name	Last commit message	Last commit date
Latest commit History 774 Commits
.github		.github
ast		ast
auth		auth
charset		charset
docs		docs
format		format
goyacc		goyacc
model		model
mysql		mysql
opcode		opcode
terror		terror
test_driver		test_driver
tidb		tidb
types		types
.editorconfig		.editorconfig
.gitignore		.gitignore
LICENSE		LICENSE
Makefile		Makefile
README.md		README.md
SECURITY.md		SECURITY.md
bench_test.go		bench_test.go
checkout-pr-branch.sh		checkout-pr-branch.sh
circle.yml		circle.yml
codecov.yml		codecov.yml
consistent_test.go		consistent_test.go
digester.go		digester.go
digester_test.go		digester_test.go
export_test.go		export_test.go
go.mod		go.mod
go.sum		go.sum
hintparser.y		hintparser.y
hintparser_test.go		hintparser_test.go
hintparser_windows32.go		hintparser_windows32.go
hintparserimpl.go		hintparserimpl.go
lexer.go		lexer.go
lexer_test.go		lexer_test.go
misc.go		misc.go
parser.go		parser.go
parser.y		parser.y
parser_test.go		parser_test.go
reserved_words_test.go		reserved_words_test.go
test.sh		test.sh
yy_parser.go		yy_parser.go