Merge branch 'add-patch-release-changelogs' into 'master'

Add patch release changelogs

See merge request !9353

CHANGELOG.md

@@ -181,6 +181,10 @@ entry.
 - Add margin to markdown math blocks.
 - Add hover state to MR comment reply button.
+## 8.15.7 (2017-02-15)
+
+- No changes.
+
 ## 8.15.6 (2017-02-14)
 - Patch Asciidocs rendering to block XSS.
@@ -451,6 +455,10 @@ entry.
 - Whitelist next project names: help, ci, admin, search. !8227
 - Adds back CSS for progress-bars. !8237
+## 8.14.10 (2017-02-15)
+
+- No changes.
+
 ## 8.14.9 (2017-02-14)
 - Patch Asciidocs rendering to block XSS.