Add root_path_android.cc to webrtc/test/Android.mk.

Fixes the broken android-platform build (build that uses .mk files).

TBR=andrew@webrtc.org,henrike@webrtc.org
BUG=

Review URL: https://webrtc-codereview.appspot.com/1777004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4314 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/test/testsupport/fileutils.cc b/webrtc/test/testsupport/fileutils.cc
index 84945ff..d4354d8 100644
--- a/webrtc/test/testsupport/fileutils.cc
+++ b/webrtc/test/testsupport/fileutils.cc
@@ -57,7 +57,7 @@
 const char* kCannotFindProjectRootDir = "ERROR_CANNOT_FIND_PROJECT_ROOT_DIR";
 
 std::string OutputPathAndroid();
-std::string ProjectRoothPathAndroid();
+std::string ProjectRootPathAndroid();
 
 void SetExecutablePath(const std::string& path) {
   std::string working_dir = WorkingDir();
@@ -93,7 +93,7 @@
 #ifdef WEBRTC_ANDROID
 
 std::string ProjectRootPath() {
-  return ProjectRoothPathAndroid();
+  return ProjectRootPathAndroid();
 }
 
 std::string OutputPath() {