Change leak detection bot name to non-perf

This CL intends to change the leak detection bot name from perf to non-perf.

Bug: 777765
Change-Id: I786aa2b756553e64671477170e3afde7aa8bb460
Reviewed-on: https://chromium-review.googlesource.com/790054Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Yuzu Saijo <yuzus@chromium.org>
Cr-Commit-Position: refs/heads/master@{#519571}

tools/mb/mb_config.pyl

@@ -646,7 +646,7 @@
       'linux_site_isolation': 'release_trybot',
       'linux_upload_clang': 'release_bot',
       'vr_linux': 'vr_release_trybot',
-      'leak_detection_linux_perf': 'release_trybot',
+      'leak_detection_linux': 'release_trybot',
     },
 
     'tryserver.chromium.mac': {