Trim "\n" from mimeType field in phabricator_file.file

Summary: See patch comment, which explains the situation.

Test Plan: Ran upgrade, verified mimeType field is \n-free in database.

Reviewers: davidreuss, btrahan

Reviewed By: davidreuss

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1624

resources/sql/patches/105.mimetype.sql

@@ -0,0 +1,4 @@
+/* Prior to D1615, we used the raw output of `file` to determine mime types,
+   without stripping carriage returns. This creates Content-Type headers
+   which are blocked by response-splitting protections introduced in D1564. */
+UPDATE phabricator_file.file SET mimeType = TRIM(BOTH "\n" FROM mimeType);