rstrnt-report-log prints stuff to stdout

[AloisMahdal]

rstrnt-report-log will print things like "Uploading ... .done" to stdout, which breaks use cases where stdout is being generated and needs to have proper format. (E.g. meta-programming.)

I didn't keep restraint version number as I reproduced it (I blamed beakerlib which turned innocent), but:

restraint/src/cmd_log.c

Line 111 in c62e8c8

g_print ("Uploading %s ", basename);

Thanks @hegerj for finding the line for me.

[AloisMahdal]

If someone tells me what should be the function I can make PR (and pretend I know C).