Merge 8b43bae10b1f5d0bd714169395e8489bf68d959a into 8807fedec55bc4dbdf7b4780d36bfc4b4fd6e5e2

Run test262 tests for Linux, macOS and Cosmopolitan

Add a Makefile `test2-bootstrap` helper to clone and patch test262 tests at
a particular commit. Running with the latest commit noticed a few tests were
failing and added them to the errors list.

The CI environment, especially for macOS, was a bit more unpredictable and was
failing in atomics tests due to lower timeouts in the `atomicsHelper` so double
the timeouts. The time didn't worsen too much. It still takes about 2-3 min.

.github/workflows/ci.yml

@@ -71,7 +71,6 @@ jobs:
           submodules: true
       - name: Install gcc-multilib
         run: |
-          sudo apt update
           sudo apt install -y gcc-multilib
       - name: Build
         run: |
@@ -181,6 +180,9 @@ jobs:
       - name: Build + test
         uses: vmactions/freebsd-vm@v1
         with:
+          # This VM has a tendency to get stuck in the "VM is booting" cycle
+          # for quite a while, so set a shorter timeout
+          timeout-minutes: 15
           usesh: true
           copyback: false
           mem: 16384