debuggerd: add libdebuggerd_client.

Bug: http://b/24414818
Change-Id: I079c534d2c952b6975bf0428eb86cc7a55525737
diff --git a/debuggerd/debuggerd.cpp b/debuggerd/debuggerd.cpp
index d87594c..a82fd07 100644
--- a/debuggerd/debuggerd.cpp
+++ b/debuggerd/debuggerd.cpp
@@ -562,7 +562,7 @@
   // won't necessarily have stopped by the time ptrace() returns.  (We
   // currently assume it does.)  We write to the file descriptor to
   // ensure that it can run as soon as we call PTRACE_CONT below.
-  // See details in bionic/libc/linker/debugger.c, in function
+  // See details in client/debuggerd_client.cpp, in function
   // debugger_signal_handler().
 
   // Attach to the target process.