Revert "Switch to logdog binary provided by IMPLIED_CIPD_BINARIES"

This reverts commit e05d720f1c8848aef216777d3d02afba0cb2d1e2.

Reason for revert: Cannot find logdog at that path

Original change's description:
> 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}

TBR=mbonadei@webrtc.org,oprypin@webrtc.org

Change-Id: I6ab6a9c4b53e1d2eb90d0294706ca71700f79177
No-Try: true
Bug: chromium:755660
Reviewed-on: https://webrtc-review.googlesource.com/c/114428
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26018}
diff --git a/tools_webrtc/mb/mb.py b/tools_webrtc/mb/mb.py
index eeeab84..485fceb 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', '../../logdog_butler',
+                 '--logdog-bin-cmd', '../../bin/logdog_butler',
                  '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
                  '--store-tombstones']
     else:
diff --git a/tools_webrtc/mb/mb_unittest.py b/tools_webrtc/mb/mb_unittest.py
index 287850b..0e7173a 100755
--- a/tools_webrtc/mb/mb_unittest.py
+++ b/tools_webrtc/mb/mb_unittest.py
@@ -304,7 +304,7 @@
     self.assertEqual(command, [
         '../../build/android/test_wrapper/logdog_wrapper.py',
         '--target', 'base_unittests',
-        '--logdog-bin-cmd', '../../logdog_butler',
+        '--logdog-bin-cmd', '../../bin/logdog_butler',
         '--logcat-output-file', '${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', '../../logdog_butler',
+        '--logdog-bin-cmd', '../../bin/logdog_butler',
         '--logcat-output-file', '${ISOLATED_OUTDIR}/logcats',
         '--store-tombstones',
     ])