SMV: test for LTL property with 'or'

This adds a test for an LTL property with a top-level 'or'.

Author: kroening

regression/smv/LTL/smv_ltlspec_or1.desc

@@ -0,0 +1,8 @@
+CORE
+smv_ltlspec_or1.smv
+--bound 10
+^\[spec1\] F !x \| G x: PROVED up to bound 10$
+^EXIT=0$
+^SIGNAL=0$
+--
+^warning: ignoring

regression/smv/LTL/smv_ltlspec_or1.smv

@@ -0,0 +1,5 @@
+MODULE main
+
+VAR x : boolean;
+
+LTLSPEC (F !x) | G x