Sort the .PATH entries to give a more reasonable order of precedence:
- architecture-specific files
- long double format-specific files
- bsdsrc
- src
- man
The original order was virtually the opposite of this.
This should not cause any functional changes at this time. The
difference is only significant when one wants to override, say, a
generic foo.c with a more specialized foo.c (as opposed to foo.S).