ima: use static const char array definitions

A const char pointer allocates memory for a pointer as well as for
a string,  This patch replaces a number of the const char pointers
throughout IMA, with a static const char array.

Suggested-by: David Howells <dhowells@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>

diff --cc security/integrity/ima/ima_api.c
Simple merge

diff --cc security/integrity/ima/ima_appraise.c
Simple merge

diff --cc security/integrity/ima/ima_init.c
Simple merge

diff --cc security/integrity/ima/ima_policy.c
Simple merge