gitlab-ci: Move meson job script to separate file

No functional change intended (except for no longer running meson
--version separately, as the version appears early in meson's output
anyway).

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>

.gitlab-ci/meson-build.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+set -e
+set -o xtrace
+
+# We need to control the version of llvm-config we're using, so we'll
+# generate a native file to do so. This requires meson >=0.49
+if test -n "$LLVM_VERSION"; then
+    LLVM_CONFIG="llvm-config-${LLVM_VERSION}"
+    echo -e "[binaries]\nllvm-config = '`which $LLVM_CONFIG`'" > native.file
+    $LLVM_CONFIG --version
+else
+    touch native.file
+fi
+
+meson _build --native-file=native.file \
+      -D buildtype=debug \
+      -D build-tests=true \
+      -D libunwind=${UNWIND} \
+      ${DRI_LOADERS} \
+      -D dri-drivers=${DRI_DRIVERS:-[]} \
+      ${GALLIUM_ST} \
+      -D gallium-drivers=${GALLIUM_DRIVERS:-[]} \
+      -D vulkan-drivers=${VULKAN_DRIVERS:-[]} \
+      -D I-love-half-baked-turnips=true
+cd _build
+meson configure
+ninja -j4
+LC_ALL=C.UTF-8 ninja test