tools: fix make-v8.sh

V8's `tools/dev/v8gen.py` does not like being passed an empty string
(`""`).

PR-URL: #36594
Refs: #36099
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Coe <bencoe@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>

tools/make-v8.sh

@@ -36,6 +36,7 @@ if [ "$ARCH" = "s390x" ] || [ "$ARCH" = "ppc64le" ]; then
   gn gen -v "out.gn/$BUILD_ARCH_TYPE" --args="is_component_build=false is_debug=false use_goma=false goma_dir=\"None\" use_custom_libcxx=false v8_target_cpu=\"$TARGET_ARCH\" target_cpu=\"$TARGET_ARCH\" v8_enable_backtrace=true"
   ninja -v -C "out.gn/$BUILD_ARCH_TYPE" d8 cctest inspector-test
 else
-  PATH=~/_depot_tools:$PATH tools/dev/v8gen.py "$BUILD_ARCH_TYPE" --no-goma "$V8_BUILD_OPTIONS"
+  # shellcheck disable=SC2086
+  PATH=~/_depot_tools:$PATH tools/dev/v8gen.py "$BUILD_ARCH_TYPE" --no-goma $V8_BUILD_OPTIONS
   PATH=~/_depot_tools:$PATH ninja -C "out.gn/$BUILD_ARCH_TYPE/" d8 cctest inspector-test
 fi