bug#20629: 25.0.50; Regression: TAGS broken, can't find anything in C++ files.

[Eli Zaretskii]

> Date: Sat, 23 May 2015 14:28:46 +0200
> From: Jan Djärv <jan.h.d@swipnet.se>
> 
> Perhaps, but until someone does, there is no need to break things that work.

No one has knowingly broken C++.  This is development, where breakage
should be expected.  If someone does production work with development
snapshots, they should be ready for this.