Add rustup + CHEZ_CONFIGURE_EXTRA to build-jerboa (fix missing rust install)

ober

4fd3a1bbddb9d3f827606d133a47091353473069

diff --git a/.builds/ci.yml b/.builds/ci.yml
index 8e97723..69ca99b 100644
--- a/.builds/ci.yml
+++ b/.builds/ci.yml
@@ -27,7 +27,10 @@ artifacts:
 tasks:
 - build-jerboa: |
     cd jerboa
-    make jerboa
+    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: |
     cd jerboa-secmon