Switch to logdog binary provided by IMPLIED_CIPD_BINARIES

https://cs.chromium.org/chromium/build/scripts/slave/recipe_modules/swarming/api.py?q=IMPLIED_CIPD_BINARIES
to stop having to specify it in
https://cs.chromium.org/chromium/build/scripts/slave/recipe_modules/webrtc/steps.py?q=ANDROID_CIPD_PACKAGES

Bug: chromium:755660
Change-Id: I1c69b0bada145ce830c4f62d6e99cc928cd29024
Reviewed-on: https://webrtc-review.googlesource.com/c/114426
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26015}
diff --git a/tools_webrtc/mb/mb.py b/tools_webrtc/mb/mb.py
index 485fceb..eeeab84 100755
--- a/tools_webrtc/mb/mb.py
+++ b/tools_webrtc/mb/mb.py
@@ -839,7 +839,7 @@
     elif is_android:
       cmdline = ['../../build/android/test_wrapper/logdog_wrapper.py',
                  '--target', target,
-                 '--logdog-bin-cmd', '../../bin/logdog_butler',
+                 '--logdog-bin-cmd', '../../logdog_butler',
                  '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
                  '--store-tombstones']
     else:
diff --git a/tools_webrtc/mb/mb_unittest.py b/tools_webrtc/mb/mb_unittest.py
index 0e7173a..287850b 100755
--- a/tools_webrtc/mb/mb_unittest.py
+++ b/tools_webrtc/mb/mb_unittest.py
@@ -304,7 +304,7 @@
     self.assertEqual(command, [
         '../../build/android/test_wrapper/logdog_wrapper.py',
         '--target', 'base_unittests',
-        '--logdog-bin-cmd', '../../bin/logdog_butler',
+        '--logdog-bin-cmd', '../../logdog_butler',
         '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
         '--store-tombstones',
     ])
@@ -338,7 +338,7 @@
     self.assertEqual(command, [
         '../../build/android/test_wrapper/logdog_wrapper.py',
         '--target', 'base_unittests',
-        '--logdog-bin-cmd', '../../bin/logdog_butler',
+        '--logdog-bin-cmd', '../../logdog_butler',
         '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
         '--store-tombstones',
     ])