stage2: move array mult test from basic.zig to misc.zig!

test/behavior/basic.zig

@@ -166,3 +166,7 @@ fn fB() []const u8 {
 test "string concatenation" {
     try expect(mem.eql(u8, "OK" ++ " IT " ++ "WORKED", "OK IT WORKED"));
 }
+
+test "array mult operator" {
+    try expect(mem.eql(u8, "ab" ** 5, "ababababab"));
+}

test/behavior/misc.zig

@@ -40,10 +40,6 @@ test "constant equal function pointers" {
 
 fn emptyFn() void {}
 
-test "array mult operator" {
-    try expect(mem.eql(u8, "ab" ** 5, "ababababab"));
-}
-
 test "string escapes" {
     try expectEqualStrings("\"", "\x22");
     try expectEqualStrings("\'", "\x27");