Fix brew warning message : "File should end with a newline"
Fix brew audit warning message : "Incorrect file permissions"

Just made a chmod 644 on these files
Fix brew audit warning message : "Use build instead of ARGV to check options"
Fix brew audit warning message : "pkg-config…"

pkg-config dependency should be "depends_on 'pkg-config' => :build"
Fix brew audit warning message : "Head-only…"

Head-only (no stable download)
Fix brew audit warning message : "skip_clean…"

`skip_clean :all` is deprecated; brew no longer strips symbols
Fix brew warning message : "new option definitions"