In my case, this is not a real library, it is an empty file so I just moved the file when encountered the error.

root@linux:~ # rpm -ivh pam-1.1.1-13.el6.i686.rpm
Preparing… ########################################### [100%]
1:pam ########################################### [100%]
/sbin/ldconfig: File /usr/lib/libnoexec.so is empty, not checked.

Just type the following command to move the file

root@linux:~ # mv /usr/lib/libnoexec.so /tmp