Use all available container CPUs for Woodpecker compilation

scripts/woodpecker-cross-test.sh

@@ -56,10 +56,12 @@ docker run --rm --user "$(id -u):$(id -g)" \
     set -euo pipefail
     export SOURCE_LOCK=/src/build/linux-toolchain/release.lock.json
     source scripts/prepare-cross-sources.sh
+    BUILD_JOBS="$(nproc)"
+    echo "Full CPU parallelism: $BUILD_JOBS compilation jobs"
     python3 build/linux-toolchain/build-cross.py \
       --target "$CROSS_RID" --sources-manifest "$WORK_DIR/cross-sources.json" \
       --work /src/External/NativeStatic/.work/toolchains \
-      --output "/src/External/NativeStatic/zig-cross/$SKIASHARP_VERSION/$CROSS_RID" --jobs 4
+      --output "/src/External/NativeStatic/zig-cross/$SKIASHARP_VERSION/$CROSS_RID" --jobs "$BUILD_JOBS"
     python3 build/linux-toolchain/package-zig.py \
       --rid "$CROSS_RID" \
       --input "/src/External/NativeStatic/zig-cross/$SKIASHARP_VERSION/$CROSS_RID" \