Fix casting non-"int" to bool.

Fix casting non-"int" to bool.

gcc/jit/ChangeLog:
	* jit-playback.c (gcc::jit::playback::context::build_cast): In
	case BOOLEAN_TYPE, don't assume that the source expression is
	of type "int".

gcc/testsuite/ChangeLog:
	* jit.dg/test-expressions.c (make_tests_of_casts): Add tests of
	casting between "long" and "bool".
	(verify_casts): Verify these new test cases.

From-SVN: r218977