Fix emscripten bug.

Compilation to web target is currently failing with the following bug
(debug lines obtained with EMCC_DEBUG=1):

make raylib_game
make[1]: Entering directory '/home/fcasas/Music/nokia-pod-racer/src'
emcc -o raylib_game.html  raylib_game.o  screen_logo.o  screen_title.o  screen_options.o  screen_gameplay.o  screen_ending.o -std=c99 -Wall -Wno-missing-braces -Wunused-result -D_DEFAULT_SOURCE -Os -s MINIFY_HTML=0 -I. -I/home/fcasas/Videos/raylib-web/src -I/home/fcasas/Videos/raylib-web/src/external -I/home/fcasas/Videos/raylib-web/src/extras -L. -L/home/fcasas/Videos/raylib-web/src -L/home/fcasas/Videos/raylib-web/src -s USE_GLFW=3 -s TOTAL_MEMORY=134217728 -s FORCE_FILESYSTEM=1 --preload-file resources --shell-file minshell.html /home/fcasas/Videos/raylib-web/src/libraylib.a -DPLATFORM_WEB
...
emcc:DEBUG: minifying HTML file raylib_game.html
profiler:DEBUG: block "final emitting" raised an exception after 0.066 seconds
profiler:DEBUG: block "post_link" raised an exception after 3.469 seconds
profiler:DEBUG: block "main" raised an exception after 3.653 seconds
Traceback (most recent call last):
  File "/usr/share/emscripten/emcc.py", line 3929, in <module>
    sys.exit(main(sys.argv))
  File "/usr/lib/python3.10/contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "/usr/share/emscripten/emcc.py", line 3922, in main
    ret = run(args)
  File "/usr/share/emscripten/emcc.py", line 1194, in run
    phase_post_link(options, state, wasm_target, wasm_target, target)
  File "/usr/lib/python3.10/contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "/usr/share/emscripten/emcc.py", line 2740, in phase_post_link
    phase_final_emitting(options, state, target, wasm_target, memfile)
  File "/usr/lib/python3.10/contextlib.py", line 79, in inner
    return func(*args, **kwds)
  File "/usr/share/emscripten/emcc.py", line 2867, in phase_final_emitting
    generate_html(target, options, js_target, target_basename,
  File "/usr/share/emscripten/emcc.py", line 3663, in generate_html
    minify_html(target)
  File "/usr/share/emscripten/emcc.py", line 3637, in minify_html
    shared.check_call(['htmlmin', opts, '--', filename, filename])
  File "/usr/share/emscripten/tools/shared.py", line 221, in check_call
    return run_process(cmd, *args, **kw)
  File "/usr/share/emscripten/tools/shared.py", line 105, in run_process
    ret = subprocess.run(cmd, check=check, input=input, *args, **kw)
  File "/usr/lib/python3.10/subprocess.py", line 501, in run
    with Popen(*popenargs, **kwargs) as process:
  File "/usr/lib/python3.10/subprocess.py", line 969, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/usr/lib/python3.10/subprocess.py", line 1778, in _execute_child
    self.pid = _posixsubprocess.fork_exec(
TypeError: expected str, bytes or os.PathLike object, not list

This seems related to this bug in emscripten:

emscripten-core/emscripten#10551

The solution is doing the same as in:

emscripten-core/emscripten#8547

adding the following compilation flag:

CFLAGS += -s MINIFY_HTML=0

src/Makefile

@@ -202,6 +202,7 @@ else
         else
             CFLAGS += -Os
         endif
+		CFLAGS += -s MINIFY_HTML=0
     else
         CFLAGS += -s -O2
     endif