build: describe the fix for compiling android node.js on an x86_64 host

[haotaoyanzhuce]

@RedYetiDev Sorry, brother, I'm not very familiar with Git, so I created multiple PRs.

from #54995

[haotaoyanzhuce]

I shortened the commit message because it was too long.

[haotaoyanzhuce]

@RedYetiDev This PR hasn't had any activity for a while. Is there still an issue? Do you need me to do anything else?

[silasol]

CCX_host is correct? I changge it to CXX_host, and works fine.

        os.environ['CC_host'] = shutil.which('gcc').strip()
        os.environ['CCX_host'] = shutil.which('g++').strip()

my build env info

node version:22.11.0
host : ubuntu  24.02 LTS x86_64
target : android arm64

[haotaoyanzhuce]

CCX_host is correct? I changge it to CXX_host, and works fine.

        os.environ['CC_host'] = shutil.which('gcc').strip()
        os.environ['CCX_host'] = shutil.which('g++').strip()

my build env info

node version:22.11.0
host : ubuntu  24.02 LTS x86_64
target : android arm64

You're right, I made a mistake here. I'll make the necessary corrections