Started work on supprting GNU/Linux 64

Libs build fine.., however during the test phase this is seen:

gcc  test.o    -o test -L../../libs -lsearduino-stub -ldl -L../shared/ -ltest  -L../../faked-arduino -lsearduino-stub -lpthread 
make[1]: Nothing to be done for `check'.
export LD_LIBRARY_PATH=../shared/:../../faked-arduino/ && ./test
dlib:         -1198649344 
setup      -1203005568 
main_fun      -1198643221 
Registering callbacks....
set_dig_input -1203007176 
get_dig_output -1203007127 
/bin/sh: line 1:  6433 Segmentation fault      ./test
make[1]: *** [check2] Error 139
make[1]: Leaving directory `/home/hesa/nongnu/searduino/test/shared-main'
make: *** [check-sw] Error 2

so some more work is needed. But the support almost there.