compiletest: Add name directive for remote runners

Allow tests to use
// ignore-remote
to ignore the test when using remote-test-{client,server}. In most
situations this would be covered by
// ignore-cross-compile
but I see no reason that a non-cross compiled remote test runner
shouldn't work.

Author: tblah

src/test/ui-fulldeps/compiler-calls.rs

@@ -3,6 +3,7 @@
 
 // ignore-cross-compile
 // ignore-stage1
+// ignore-remote
 
 #![feature(rustc_private)]
 

src/test/ui-fulldeps/mod_dir_path_canonicalized.rs

@@ -1,6 +1,7 @@
 // run-pass
 // Testing that a librustc_ast can parse modules with canonicalized base path
 // ignore-cross-compile
+// ignore-remote
 
 #![feature(rustc_private)]
 

src/tools/compiletest/src/header.rs

@@ -853,6 +853,7 @@ impl Config {
             name == util::get_pointer_width(&self.target) ||    // pointer width
             name == self.stage_id.split('-').next().unwrap() || // stage
             (self.target != self.host && name == "cross-compile") ||
+            (self.remote_test_client.is_some() && name == "remote") ||
             match self.compare_mode {
                 Some(CompareMode::Nll) => name == "compare-mode-nll",
                 Some(CompareMode::Polonius) => name == "compare-mode-polonius",