web-wasm: Bump emscripten to sdk-tag-1.38.48
web-wasm: Bump emscripten to sdk-tag-1.38.48

dockcross/dockcross,thewtex/cross-compilers,thewtex/cross-compilers,thewtex/cross-compilers,dockcross/dockcross,dockcross/dockcross,dockcross/dockcross,thewtex/cross-compilers