doc: add libltdl-dev for linux

[ahaoboy]

Compiling on ubuntu24.04 with github runner will give an error

configure.ac:215: error: possibly undefined macro: LT_SYS_SYMBOL_USCORE
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: error: /usr/bin/autoconf failed with exit status: 1

libffi/libffi#210

It seems that libuv and libffi require libltdl-dev

sudo apt-get install libltdl-dev

[saghul]

I think it might be better to link with the system libffi TBH... I'm going to sleep a bit on this.

[ahaoboy]

I think it might be better to link with the system libffi TBH... I'm going to sleep a bit on this.

Have a good rest. I just found through searching that this compilation error can be fixed by installing libltdl-dev.

https://github.com/ahaoboy/js-engine-benchmark/actions/runs/11816168716/job/32918888844