linux/proc: do something with 'TLB size'

Right now, parse-proc-cpuinfo throws an exception on my machine, it doesn't handle the "TLB size" line.
   * should it throw an exception if there is an unknown line ?
   * what to do with TLB size ?

For info, here's what I got on my machine 
```
jon@zik:~/factor$ uname -a
Linux zik 3.2.0-53-generic #81-Ubuntu SMP Thu Aug 22 21:01:03 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

jon@zik:~/factor$ cat /proc/cpuinfo 
[ snip... ]
bogomips	: 3292.83
TLB size	: 1024 4K pages
clflush size	: 64
```