[roll third_party/pigweed] pw_web: Add Mocha and Jest global vars to ESLint

This change fixes ESLint errors that would occur when using Mocha
variables (e.g. `describe`, `beforeEach`) in test scripts for
the log viewer.

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/183931

https://pigweed.googlesource.com/pigweed/pigweed
third_party/pigweed Rolled-Commits: 65e429cf96e79e1..70b05788999ebb5
Roller-URL: https://ci.chromium.org/b/8762436635569886129
GitWatcher: ignore
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I31afc39e5c03658472752e0a0fc00fd611b6526d
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/experimental/+/184213
Bot-Commit: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Pigweed Roller <pigweed-roller@pigweed-service-accounts.iam.gserviceaccount.com>
diff --git a/third_party/pigweed b/third_party/pigweed
index 65e429c..70b0578 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 65e429cf96e79e14ecfc09e5762b7c01134f9db2
+Subproject commit 70b05788999ebb5298edc6551ca99aa95e4524db