xdiff: move stdint.h to xdiff.h
It's more correct to put it in xdiff.h since that file actually uses int64_t
etc and xdiff.h is included by xinclude.h.
This should fix the oss-fuzz build. Thanks durin42 for discovering the
issue.
Test Plan:
`make local` and xdiff related tests still work.
Differential Revision: https://phab.mercurial-scm.org/D2848
{
// Enforcing
"eqeqeq" : true, // true: Require triple equals (===) for comparison
"forin" : true, // true: Require filtering for..in loops with obj.hasOwnProperty()
"freeze" : true, // true: prohibits overwriting prototypes of native objects such as Array, Date etc.
"nonbsp" : true, // true: Prohibit "non-breaking whitespace" characters.
"undef" : true, // true: Require all non-global variables to be declared (prevents global leaks)
// Environments
"browser" : true // Web Browser (window, document, etc)
}