print information about opened files when failed unmount

Change-Id: I88ae719cdae490433390d624f75612a9f4f96677

Cryptfs : Enabling support for allow_discards in dmcrypt.
Cryptfs : Password matches
Cryptfs : test_mount_encrypted_fs(): Master key saved
TrustyKeymaster: Creating device
TrustyKeymaster: Device address: 0x7f8f416100
Cryptfs : keymaster version is 3
Cryptfs : Just asked init to shut down class main
ServiceManager: service 'drm.drmManager' died
ServiceManager: service 'media.audio_flinger' died
ServiceManager: service 'media.player' died
ServiceManager: service 'media.camera' died
ServiceManager: service 'android.security.keystore' died
Cryptfs : unmounting /data failed

Bug: 17576594
diff --git a/Process.cpp b/Process.cpp
index ea5fbc7..08be28e 100644
--- a/Process.cpp
+++ b/Process.cpp
@@ -170,6 +170,10 @@
     return result;
 }
 
+extern "C" void vold_killProcessesWithOpenFiles(const char *path, int action) {
+	Process::killProcessesWithOpenFiles(path, action);
+}
+
 /*
  * Hunt down processes that have files open at the given mount point.
  * action = 0 to just warn,