canonicalize_file_name: Generalize check for mapped network drive (bug #62847). * liboctave/system/file-ops.cc (canonicalize_file_name): Any directory on a share (or the share itself) can be mapped to a drive letter on Windows. Generalize checks when replacing mapped root with drive letter.

%canon_reldir%_EXTRA_DIST =

include %reldir%/code/module.mk
include %reldir%/data/module.mk

%canon_reldir%_EXTRA_DIST += \
  %reldir%/code/COPYING

EXTRA_DIST += $(%canon_reldir%_EXTRA_DIST)