[clearlinux/swupd-server] Replace system calls by local system_argv functions.

[jrguzman-intel]

There are new functions that replace system() calls: system_argv(), system_argv_fd and system_argv_pipe(). They are based on execvp() function and they can manage any argument including filenames with characters that could be interpreted as meta-characters in a regular system() function. So no escape for the arguments needed and is less prone to errors.

Signed-off-by: Jose R Guzman jose.r.guzman.mosqueda@intel.com

[phmccarty]

Those are all the comments I have for now on this patch :-)

[phmccarty]

+1, will merge shortly.

[phmccarty]

I squashed the series and pushed to master.