updated syscalls doc
updated syscalls doc

albrow/gopherjs,roth1002/gopherjs,Archs/gopherjs,jeremyschlatter/gopherjs,bpowers/gopherjs,nmfzone/gopherjs,Yanjing123/gopherjs,flimzy/gopherjs,nmfzone/gopherjs,govlas/gopherjs,albrow/gopherjs,jargv/gopherjs,gopherjs/gopherjs,flimzy/gopherjs,jeremyschlatter/gopherjs,rasata/gopherjs,Yanjing123/gopherjs,roth1002/gopherjs,rasata/gopherjs,roth1002/gopherjs,ebroder/gopherjs,gopherjs/gopherjs,albrow/gopherjs,govlas/gopherjs,nmfzone/gopherjs,jargv/gopherjs,Yanjing123/gopherjs,jargv/gopherjs,Archs/gopherjs,rasata/gopherjs,bpowers/gopherjs,bpowers/gopherjs,gopherjs/gopherjs,ebroder/gopherjs,gopherjs/gopherjs,govlas/gopherjs,ebroder/gopherjs,flimzy/gopherjs,gopherjs/gopherjs,Archs/gopherjs,jeremyschlatter/gopherjs