chore: add prefer-pre-built option for spc download (#921)

build-static.sh

@@ -115,7 +115,7 @@ else
     fi
 
     ./bin/spc doctor --auto-fix
-    ./bin/spc download --with-php="${PHP_VERSION}" --for-extensions="${PHP_EXTENSIONS}" --for-libs="${PHP_EXTENSION_LIBS}" --ignore-cache-sources=php-src
+    ./bin/spc download --with-php="${PHP_VERSION}" --for-extensions="${PHP_EXTENSIONS}" --for-libs="${PHP_EXTENSION_LIBS}" --ignore-cache-sources=php-src --prefer-pre-built
     # shellcheck disable=SC2086
     ./bin/spc build --debug --enable-zts --build-embed ${extraOpts} "${PHP_EXTENSIONS}" --with-libs="${PHP_EXTENSION_LIBS}"
 fi