Add swap + rustup + CHEZ_CONFIGURE_EXTRA=--disable-x11 to CI bootstrap

ober

5e4702fa94e138eb072684dd07f8de05976aed37

diff --git a/.build.yml b/.build.yml
index 0744180..dd50081 100644
--- a/.build.yml
+++ b/.build.yml
@@ -24,7 +24,12 @@ artifacts:
 tasks:
   - build-jerboa-tools: |
       cd jerboa
-      make jerboa
+      sudo fallocate -l 4G /swapfile && sudo chmod 600 /swapfile && sudo mkswap /swapfile && sudo swapon /swapfile
+      export CARGO_BUILD_JOBS=1
+      curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | \
+        sh -s -- -y --profile minimal --default-toolchain 1.94.1
+      source "$HOME/.cargo/env"
+      make jerboa CHEZ_CONFIGURE_EXTRA=--disable-x11
       echo 'export PATH="$HOME/jerboa/dist:$PATH"' >> ~/.buildenv
   - package-emacs: |
       cd jerboa-emacs