Fix passing MIN_x_VERSION in EMCC_CFLAGS when running with a skip env. var. set.#25753

juj merged 2 commits intoemscripten-core:mainemscripten-core/emscripten:mainfrom

juj:fix_min_x_version_in_test_harnessjuj/emscripten:fix_min_x_version_in_test_harnessCopy head branch name to clipboard