[fpc-pascal] Link libglx library.

[Guillermo Martínez Jiménez]

Hello.

I'm working on a project that needs the GLX library. It compiles but
when running it returns that error:

./exbasic: symbol lookup error: /usr/local/lib/libagl.so: undefined
symbol: glXQueryExtension

In other forum a colleague suggest that it doesn't links with the
libglx.so . I'm trying to force it using the command line but it
returns that error on compiling time: