Merged from trunk 11354:11357

   Merged from trunk 11354:11357

   | 11355   | In LinkageMap.rebuild(), filter empty strings that may be    |
   | zmedico | returned from split calls when processing the "needed" and   |
   |         | "path" entries. Thanks to Lucian Poston for reporting.       |

   | 11356   | Fix broken reference to os.path.realpath() inside            |
   | zmedico | LinkageMap.getSoname().                                      |

   | 11357   | Add new LinkageMap.listBrokenBinaries() and listProviders()  |
   | zmedico | methods. Thanks to Lucian Poston <lucianposton@gmail.com>    |
   |         | for submitting this patch along with the missing-rebuild     |
   |         | package set posted on the gentoo-portage-dev mailing list.   |

svn path=/main/branches/prefix/; revision=11369