Allow has_post_format() to accept an array of formats to check. props ericmann. fixes #17320.

Merges [24817] to the 3.6 branch.



git-svn-id: https://core.svn.wordpress.org/branches/3.6@24933 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: Call has_post_format() with the new array style. props obenland, fixes #24905. Merges [24934] to 3.6.



git-svn-id: https://core.svn.wordpress.org/branches/3.6@24935 1a063a9b-81f0-0310-95a4-ce76da25c4cd