Use "make -C" syntax

[bkabrda]

Most Makefiles that we have now do things like cd <somedir> && make <action>. The make utility actually supports the -C switch, which allows to do the same in a much more succinct (and IMO also readable) way. E.g. the above would be rewritten make -C <somedir> <action>. How about we change all Makefiles to adhere to this?

[TomasTomecek]

I was reading about this before merging the first cd ... && make ... PR and I think that upstream documentation (or stackoverflow) said it doesn't matter, hence I don't have preference. Feel free to fix it, I will gladly merge.