Ensure that all tests have different names.

* src/ltltest/Makefile.am, src/tgbatest/Makefile.am: update references.
* src/ltltest/exclusive.test, src/ltltest/stutter.test,
src/tgbatest/exclusive.test, src/tgbatest/stutter.test: rename as...
* src/ltltest/exclusive-ltl.test, src/ltltest/stutter-ltl.test,
src/tgbatest/exclusive-tgba.test,
src/tgbatest/stutter-tgba.test: ...these

src/ltltest/Makefile.am

@@ -98,7 +98,7 @@ TESTS = \
   ltlgrind.test \
   ltlcrossgrind.test \
   ltlfilt.test \
-  exclusive.test \
+  exclusive-ltl.test \
   latex.test \
   lbt.test \
   lenient.test \
@@ -111,7 +111,7 @@ TESTS = \
   reduccmp.test \
   uwrm.test \
   eventuniv.test \
-  stutter.test
+  stutter-ltl.test
 
 distclean-local:
 	rm -rf $(TESTS:.test=.dir)

src/tgbatest/Makefile.am

@@ -92,7 +92,7 @@ TESTS = \
   explpro4.test \
   tripprod.test \
   dupexp.test \
-  exclusive.test \
+  exclusive-tgba.test \
   remprop.test \
   degendet.test \
   degenid.test \
@@ -121,7 +121,7 @@ TESTS = \
   isomorph.test \
   uniq.test \
   sbacc.test \
-  stutter.test \
+  stutter-tgba.test \
   emptchk.test \
   emptchke.test \
   dfs.test \