Revert "???"

This reverts commit 86546a9.

Author: msullivan

mypyc/build.py

@@ -299,7 +299,7 @@ def write_file(path: str, contents: str) -> None:
         # together (like in a test) setuptools might not realize the source is newer
         # than the new artifact.
         # XXX: This is bad though.
-        new_mtime = os.stat(path).st_mtime + 2
+        new_mtime = os.stat(path).st_mtime + 1
         os.utime(path, times=(new_mtime, new_mtime))