mdSubheader: ng-show does not work anymore

[Frank3K]

Actual behavior:

• What is the issue? The directive ng-show does not work anymore on the md-subheader component.
• What is the expected behavior? When a ng-show directive is added on an md-subheader with a value that evaluates to false, then the md-subheader component should not be displayed.

CodePen or Steps to reproduce the issue: *

• CodePen Demo which shows your issue : http://codepen.io/anon/pen/qNEaxV
• Details: Demo adapted from a demo from the docs.

Angular Versions: *

• Angular Version: 1.5.5
• Angular Material Version: v1.1.0-rc4-master-4aa7160

Additional Information:

• Browser Type: Chromium
• Browser Version: 50
• OS: Ubuntu 16.04
• Stack Traces: none

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I think the issue was introduced in 44140ce.