Pull in composer dependencies before running make tests

This is because Makefiles implicitly depend on a distributed
tarball (or initialized maintainer/inplace install).
Running `make dist` would be a bit too much, so take this
shortcut.

Author: eldering

.github/jobs/configure-checks/setup_configure_image.sh

@@ -13,10 +13,12 @@ case $distro_id in
         apt-get install pkg-config make bats autoconf -y ;;
 esac
 
-# Build the configure file
-make configure
+# Start from a configured, distribution-ready source tree. Ideally,
+# we'd like to call `make dist` but that depends on LaTeX for building
+# the documentation, so take a shortcut.
+make configure composer-dependencies
 
-# Install extra assert statements for bots
+# Install extra assert statements for bats
 cp submit/assert.bash .github/jobs/configure-checks/
 
 # Run the configure tests for this usecase