Bug in finding swap file - strcmp

[ishaansehgal99]

This PR can be used as conversation. I have a concern with find swap file function. Previously the !strcmp(type, "file") would never evaluate to true, because type is a non null-terminated field from the /proc/swaps file. The type string would include total size, used size, and priority in the same line.

Correcting this line to strncmp, raised other concerns, however:

1. While the size stored in /proc/swaps on my machine is in kb will this be true on all machines
2. Is this method more reliable/preferred then the backup method which simply checks stat size on /hiberfile.sys