Fix command line to build the demo with freepascal installed using

the official package.

bepascal/demos/demo/compile

@@ -3,6 +3,6 @@ if [ ! -d units ]
   then mkdir units
 fi
 
-ppc386 -FE./ -FU./units ./sources/main.pp -oBPDemo -g -gl
+ppc386 -S2 -FE./ -FU./units ./sources/main.pp -oBPDemo -Fu../../source/bepascal/pas/src/be/* -g -gl
 mergeres ./sources/Resource.rsrc BPDemo
 mimeset BPDemo