.gitignore in iconv-1.0.1 vs .gitignore in iconv-1.0.2

@@ -1,16 +1,20 @@
 *.gem
+*.o
 *.rbc
+*.so
 *.swp
 .bundle
 .config
 .yardoc
 Gemfile.lock
 InstalledFiles
+Makefile
 _yardoc
 coverage
 doc/
 lib/bundler/man
+mkmf.log
 pkg
 rdoc
 spec/reports
 test/tmp
 test/version_tmp