All ttbld-generated paths in .srcfiles.yaml should use forward slashes (/)

Description:

Windows can handle paths with either forward slashes or back slashes. However, POSIX systems (Mac, Unix) don't know what a backslash is in a path. Since the ultimate goal of .srcfiles.yaml is to work on all platforms, we need to be certain that all paths specified that we create only use forward slashes.

Issue Type:

• Bug report
• Feature request
• Design change request
• Other