Enable multiple writes to the IMA policy

configname: CONFIG_IMA_WRITE_POLICY

Linux Kernel Configuration
└─>Security options
└─>Enable multiple writes to the IMA policy
In linux kernel since version 4.1 (release Date: 2015-06-21)  
IMA policy can now be updated multiple times. The new rules get
appended to the original policy. Have in mind that the rules are
scanned in FIFO order so be careful when you design and add new ones.

If unsure, say N.