* Makefile.in, common.mk: move common-srcs to Makefile.in because
  it breaks build on mswin.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48943 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* tool/extlibs.rb (do_extract): the pipe should be binmode.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48944 b2dd03c8-39d4-4d8f-98ff-823fe69b080e