tools/profile: fix suggestion about when to increase stack-storage-size
tools/profile: fix suggestion about when to increase stack-storage-size

When we do stack traces via stackmaps, hash collisions (-EEXIST) may indicate
that the map size is too small. Not -ENOMEM.

iovisor/bcc,brendangregg/bcc,brendangregg/bcc,tuxology/bcc,iovisor/bcc,tuxology/bcc,brendangregg/bcc,tuxology/bcc,iovisor/bcc,tuxology/bcc,iovisor/bcc,brendangregg/bcc,tuxology/bcc,brendangregg/bcc,iovisor/bcc