Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/0538c5c: Update to commit a57c6640e843cdfd653c23d1b6f1c77856b81f14
- https://github.com/tianon/docker-bash/commit/df6fe4b: Update to commit 3710ed629f6b52a3f9247ecf7b02080aec9451f8

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20200707, devel
+Tags: devel-20200714, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: b29463e0a24250ae2ae43a03160a51eece9b7088
+GitCommit: 0538c5c97d85a7e9564f93a36fc5c4982e13a118
 Directory: devel
 
 Tags: 5.1-alpha, 5.1-rc, rc