Move some tests that now pass with LLVM 3.0 from failing_tests to tests/

tests/max-uint.ispc

@@ -0,0 +1,10 @@
+
+export uniform int width() { return programCount; }
+
+export void f_f(uniform float result[], uniform float aa[]) {
+    unsigned int i = (unsigned int)aa[programIndex];
+    result[programIndex] = max((unsigned int)100, i);
+}
+
+export void result(uniform float r[]) { r[programIndex] = 100; }
+