__libc_start_main() from glibc.2.33.so or older needs to have a __libc_csu_init function callback parameter.

glibc-2.34 on the other hand has a different __libc_start_main() that does not use it,
and the start.S file from glibc-2.34 no longer construct the init function and pass null when calling __libc_start_main.

So, When targetting an older glibc, use the start.s files as they were in glibc-2.33 and construct the __libc_csu_init function.

fixes #10386 #10512