[Bug preprocessor/65852] Incorrect escaping in depfiles

[paul_robinson at playstation dot sony.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65852

--- Comment #5 from Paul Robinson <paul_robinson at playstation dot sony.com> 
---
Compare how space and # are handled, to see the problem.
They need to be handled the same way.