Add trybot analyze exclusion for sysroots.json

R=dpranke@chromium.org
CC=thestig@chromium.org

Change-Id: I311cf3d81d3d642532be7534763ddeb918852c49
Reviewed-on: https://chromium-review.googlesource.com/596678Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491278}

testing/buildbot/trybot_analyze_config.json

@@ -16,7 +16,6 @@
       "build/check_gn_headers_whitelist.txt",
       "build/get_landmines.py",
       "build/gyp_chromium",
-      "build/linux/sysroot_ld_path.sh",
       "build/mac_toolchain.py",
       "build/toolchain/get_concurrent_links.py",
       "build/toolchain/mac/.*py",
@@ -75,5 +74,11 @@
     "exclusions": [
       "ios/build/bots/.*"
     ]
+  },
+  "linux": {
+    "exclusions": [
+      "build/linux/sysroot_ld_path.sh",
+      "build/linux/sysroot_scripts/sysroots.json"
+    ]
   }
 }