fixes ossec/ossec-hids#211

This is a fix for Solaris and Rootcheck: 

> From: ossec/ossec-hids#211
>
> We have 2 brand new Oracle Solaris 11.1 SPARC servers and compiled OSSEC 2.7.1 
> on them. On OSSEC startup, they both complain many directories (all of them 
> under /dev) have possible hidden files because "Link count does not match 
> number of files"
> 
> Example:
> ```
> ...
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/rdsk'. Link count does not match number of files (2,42).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/removable-media/dsk'. Link count does not match number of files (2,18).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/removable-media/rdsk'. Link count does not match number of files (2,18).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/sad'. Link count does not match number of files (2,4).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/term'. Link count does not match number of files (2,13).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/usb/46b.ff10/0'. Link count does not match number of files (2,9).
> outstanding,2014 May 22 15:50:52,2014 May 22 15:50:52,System Audit: Files hidden inside directory '/dev/usb/46b.ff20/0'. Link count does not match number of files (2,9).
> ...