[fpc-pascal] x86-64/linux snapshot upload

[Florian Klaempfl]

The first x86-64/linux snapshot has been uploaded.

As you can see from the regression test results, the compiler is very 
stable already:
http://www.freepascal.org/cgi-bin/testsuite.cgi?TESTOS=0&TESTCPU=7&TESTVERSION=0&TESTDATE=
(i386 for comparison: 
http://www.freepascal.org/cgi-bin/testsuite.cgi?TESTOS=0&TESTCPU=1&TESTVERSION=0&TESTDATE=)

However, most programs doesn't compile or work out of the box because of 
32<->64 bit issues. You can find some information about these issues 
here: 
http://www.freepascal.org/wiki/index.php/Writing_portable_code_regarding_the_processor_architecture

Also converted C headers cause often problems because of incorrect data 
type conversion so don't expect to install the compiler and compile a 
working 64 bit lazarus with it ;)