added a sigsetjmp test

this is what bash is currently using (we're supposed to be posix compatible after all)
success on R5, R5 setjmp.h; fail on R5, Haiku setjmp.h (could be expected)
to be tested: on Haiku, R5 & Haiku setjmp.h


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17430 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/system/libroot/posix/sigsetjmp_test.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2005, Axel Dörfler, [email protected].
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include <stdio.h>
+#include <setjmp.h>
+
+void
+jump_to_top_level(jmp_buf *state, int value)
+{
+	siglongjmp(*state, value);
+}
+
+
+int
+main(int argc, char **argv)
+{
+	jmp_buf state;
+	int value;
+
+	if (value = sigsetjmp(state, 1)) {
+		printf("failed with: %d!\n", value);
+	} else {
+		printf("here I am: %d\n", value);
+		jump_to_top_level(&state, 42);
+		printf("you won't see me!\n");
+	}
+
+	puts("done.");
+	return 0;
+}