README.md: Mention the dependency on file
README.md: Mention the dependency on file

Signed-off-by: Bob W. Hogg <c772a964fd55352a3510e5d535dd9ccc9ac30168@linux.com>

Linuxbrew/brew,Linuxbrew/brew,rwhogg/brew,Linuxbrew/brew,maxim-belkin/brew,rwhogg/brew,hanxue/linuxbrew,hanxue/linuxbrew,hanxue/linuxbrew,maxim-belkin/brew,maxim-belkin/brew,rwhogg/brew,Linuxbrew/brew