gn: Support build directories outside the source tree.

tools/gn/label_pattern_unittest.cc

Index: tools/gn/label_pattern_unittest.cc
diff --git a/tools/gn/label_pattern_unittest.cc b/tools/gn/label_pattern_unittest.cc
index 21d6a9b12149f39cea41864b06e8ec1f697f1b74..2d9eca60e58b40df6940c2929314ff6fa636450e 100644
--- a/tools/gn/label_pattern_unittest.cc
+++ b/tools/gn/label_pattern_unittest.cc
@@ -62,7 +62,6 @@ TEST(LabelPattern, PatternParse) {
     Err err;
     LabelPattern result =
         LabelPattern::GetPattern(current_dir, Value(NULL, cur.input), &err);
-

[brettw, 2014/11/05 19:59:49]

Revert this file.

[zeuthen, 2014/11/07 19:24:12]

Done.

     EXPECT_EQ(cur.success, !err.has_error()) << i << " " << cur.input;
     EXPECT_EQ(cur.type, result.type()) << i << " " << cur.input;
     EXPECT_EQ(cur.dir, result.dir().value()) << i << " " << cur.input;