Add JSON.stringify() fastpath for plain buffer
Add JSON.stringify() fastpath for plain buffer

svaarala/duktape,harold-b/duktape,markand/duktape,markand/duktape,markand/duktape,markand/duktape,markand/duktape,harold-b/duktape,markand/duktape,svaarala/duktape,svaarala/duktape,harold-b/duktape,harold-b/duktape,markand/duktape,svaarala/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,harold-b/duktape,svaarala/duktape,svaarala/duktape,svaarala/duktape,harold-b/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,markand/duktape