Replace absolute path with relative path for GN files.

Bug: webrtc:7952
Change-Id: I45d889bd976f58386f803d0dc27147ea00a52e56
Reviewed-on: https://chromium-review.googlesource.com/612786
Commit-Queue: Henrik Kjellander <kjellander@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19357}
diff --git a/webrtc/webrtc.gni b/webrtc/webrtc.gni
index 876ddeb..071c9cc 100644
--- a/webrtc/webrtc.gni
+++ b/webrtc/webrtc.gni
@@ -272,8 +272,8 @@
       public_configs += invoker.public_configs
     }
     if (!build_with_chromium && is_android) {
-      android_manifest = "//webrtc/test/android/AndroidManifest.xml"
-      deps += [ "//webrtc/test:native_test_java" ]
+      android_manifest = webrtc_root + "test/android/AndroidManifest.xml"
+      deps += [ webrtc_root + "test:native_test_java" ]
     }
   }
 }