fix installation of gtec.hh

* spot/twaalgos/gtec/Makefile.am: install it in spot/twaalgos/gtec,
not spot/tgbaalgos/gtec.
* NEWS: Mention it.

NEWS

@@ -10,6 +10,11 @@ New in spot 1.99.8a (not yet released)
     people migrating old C++ code written for Spot 1.2.x, and update
     it for Spot 2.0.
 
+  Bug fixes:
+
+  * spot/twaalgos/gtec/gtec.hh was incorrectly installed as
+  spot/tgbaalgos/gtec/gtec.hh.
+
 New in spot 1.99.8 (2016-02-18)
 
   Command-line tools:

spot/twaalgos/gtec/Makefile.am

 ## -*- coding: utf-8 -*-
-## Copyright (C) 2011, 2013, 2014 Laboratoire de Recherche et Developpement
-## de l'Epita (LRDE).
+## Copyright (C) 2011, 2013, 2014, 2016 Laboratoire de Recherche et
+## Developpement de l'Epita (LRDE).
 ## Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
 ## département Systèmes Répartis Coopératifs (SRC), Université Pierre
 ## et Marie Curie.
@@ -23,7 +23,7 @@
 AM_CPPFLAGS = -I$(top_builddir) -I$(top_srcdir) $(BUDDY_CPPFLAGS)
 AM_CXXFLAGS = $(WARNING_CXXFLAGS)
 
-gtecdir = $(pkgincludedir)/tgbaalgos/gtec
+gtecdir = $(pkgincludedir)/twaalgos/gtec
 
 gtec_HEADERS = \
   ce.hh \