extmk.rb: fix mixing mkmf.log

* ext/extmk.rb (extmake): close mkmf.log for each libraries so that
  failure messages are not mixed.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37879 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Nov 27 09:59:16 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/extmk.rb (extmake): close mkmf.log for each libraries so that
+	  failure messages are not mixed.
+
 Tue Nov 27 09:58:48 2012  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* ext/digest/*/extconf.rb, ext/openssl/extconf.rb: get git rid of

ext/extmk.rb

@@ -201,6 +201,7 @@ def extmake(target)
             begin
               load $0 = conf
             ensure
+              Logging::log_close
               $stderr.reopen(stderr)
               $stdout.reopen(stdout)
               stdout.close