Update docker-library images

- `docker`: 17.05.0-ce-rc1
- `mariadb`: 5.5.55

library/docker

@@ -4,6 +4,18 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/docker.git
 
+Tags: 17.05.0-ce-rc1, 17.05.0-ce, 17.05.0, 17.05-rc, rc
+GitCommit: 56215ac49d9947e317154fad823410df1201089b
+Directory: 17.05-rc
+
+Tags: 17.05.0-ce-rc1-dind, 17.05.0-ce-dind, 17.05.0-dind, 17.05-rc-dind, rc-dind
+GitCommit: 56215ac49d9947e317154fad823410df1201089b
+Directory: 17.05-rc/dind
+
+Tags: 17.05.0-ce-rc1-git, 17.05.0-ce-git, 17.05.0-git, 17.05-rc-git, rc-git
+GitCommit: 56215ac49d9947e317154fad823410df1201089b
+Directory: 17.05-rc/git
+
 Tags: 17.04.0-ce, 17.04.0, 17.04, 17, latest, edge
 GitCommit: 587b66d54a69996fc765c9671eb9bc8740172f2d
 Directory: 17.04

library/mariadb

@@ -12,6 +12,6 @@ Tags: 10.0.30, 10.0
 GitCommit: 21eed39fdd34c84ecd83cc077ad3253cfa875c5c
 Directory: 10.0
 
-Tags: 5.5.54, 5.5, 5
-GitCommit: 21eed39fdd34c84ecd83cc077ad3253cfa875c5c
+Tags: 5.5.55, 5.5, 5
+GitCommit: 2741b77629c3526aa20b709a53892ca9287e0859
 Directory: 5.5