Add debian/watch file for autogenerated archives from tags on GitHub.
Add debian/watch file for autogenerated archives from tags on GitHub.

R=daniel@pocock.pro
BUG=

Review URL: https://codereview.appspot.com/105970043

caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp,caseykramer/libphonenumber-csharp