move stage2 compile errors out of special folder

test/cases/compile_errors/embed_outside_package.zig

@@ -0,0 +1,8 @@
+export fn a() usize {
+    return @embedFile("/root/foo").len;
+}
+
+// error
+// target=native
+//
+//:2:23: error: embed of file outside package path: '/root/foo'