- `if exist` and `del` ignore directories matching the wildcard,
remove both separately.
- `rd /s` ignores wildcards, while `del` removes ordinary files by the
wildcard, iterate over matching directories by `for /D`.
* win32/rm.bat: removing by wildcard errs on network file system, so
remove each files.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38782 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
separate files under directories due to directory separator.
* */Makefile.sub (MKFILES): common.mk and */Makefile.sub should not be
removed.
* win32/Makefile.sub, wince/Makefile.sub: $* cannot appear in explicit
rules.
* cygwin/GNUmakefile.in: some mingw stuffs were missed.
* lib/mkmf.rb (create_makefile): Borland make wrongly removes braces
from command lines.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@6001 b2dd03c8-39d4-4d8f-98ff-823fe69b080e