Update bash

Changes:

- https://github.com/tianon/docker-bash/commit/cf29441: Update to commit e2169ae94eb2914839505bb33152a5850461b358
- https://github.com/tianon/docker-bash/commit/4ca7f4c: Make update.sh more resilient against "curl: (23) Failed writing body"

library/bash

@@ -3,9 +3,9 @@
 Maintainers: Tianon Gravi <[email protected]> (@tianon)
 GitRepo: https://github.com/tianon/docker-bash.git
 
-Tags: devel-20190705, devel
+Tags: devel-20190712, devel
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: fe0fe8a7fec1c5d07c2f9143d113faf4ae30461c
+GitCommit: cf29441746c454c2a3a9143579ac73261ef49171
 Directory: devel
 
 Tags: 5.0.7, 5.0, 5, latest