CI: Build wayland-protocols in container

Keep this as part of our container image; there's no reason to pull it
for every single build.

Signed-off-by: Daniel Stone <daniels@collabora.com>

.gitlab-ci.yml

@@ -26,7 +26,7 @@ stages:
   variables:
     FDO_DISTRIBUTION_VERSION: buster
     FDO_DISTRIBUTION_EXEC: 'env FDO_CI_CONCURRENT=${FDO_CI_CONCURRENT} bash .gitlab-ci/debian-install.sh'
-    FDO_DISTRIBUTION_TAG: '2021-07-31.0-pipewire'
+    FDO_DISTRIBUTION_TAG: '2021-07-31.1-wayland-protocols'
 
 .ci-rules:
   rules:
@@ -70,17 +70,6 @@ container_prep:
     BUILDDIR: $CI_PROJECT_DIR/build-weston-$CI_JOB_NAME
     PREFIX: $CI_PROJECT_DIR/prefix-weston-$CI_JOB_NAME
   before_script:
-  - git clone --depth=1 https://gitlab.freedesktop.org/wayland/wayland-protocols
-  - export WAYLAND_PROTOCOLS_DIR="$(pwd)/prefix-wayland-protocols"
-  - export PKG_CONFIG_PATH="$WAYLAND_PROTOCOLS_DIR/share/pkgconfig:$PKG_CONFIG_PATH"
-  - export MAKEFLAGS="-j${FDO_CI_CONCURRENT:-4}"
-  - cd wayland-protocols
-  - git show -s HEAD
-  - mkdir build
-  - cd build
-  - ../autogen.sh --prefix="$WAYLAND_PROTOCOLS_DIR"
-  - make install
-  - cd ../../
   - export XDG_RUNTIME_DIR="$(mktemp -p $(pwd) -d xdg-runtime-XXXXXX)"
   - export TESTS_RES_PATH="$BUILDDIR/tests-res.txt"
   - mkdir "$BUILDDIR" "$PREFIX"

.gitlab-ci/debian-install.sh

@@ -25,7 +25,6 @@ MESA_DEV_PKGS="
 	llvm-8-dev
 	python-mako
 	python3-mako
-	wayland-protocols
 "
 
 # Needed for running the custom-built mesa
@@ -147,6 +146,16 @@ cd build
 make install
 cd ../../
 
+git clone --branch 1.19 https://gitlab.freedesktop.org/wayland/wayland-protocols
+cd wayland-protocols
+git show -s HEAD
+mkdir build
+cd build
+../autogen.sh
+make install
+cd ../../
+rm -rf wayland-protocols
+
 apt-get -y --no-install-recommends install $MESA_DEV_PKGS
 git clone --single-branch --branch 20.3 --shallow-since='2020-12-15' https://gitlab.freedesktop.org/mesa/mesa.git mesa
 cd mesa