Do not fail when creating an already existing directory
Fix building quagga on 64bit systems

Install the correct libs in .../lib64
NOTE: The guest kernel must be 64bit (sh monolithic ... -8)
NOTE2: Before starting quagga daemons, the guest must do
	export LD_LIBRARY_PATH=/home/vrouter/Public-Quagga/lib64
       then, /home/vrouter/Public-Quagga/lib64/ld-linux-x86-64.so.2 <program name>...