learning how meson works. may not be the cleanest or nicest... but
it's not too bad. it does work. ninja dist works.
build times improved. for a full autogen.sh, make etc. -> 5.205s to 0.759s
This reverts commit 25ffdc470c.
go back to good 'old subdir build. it's just too much of a pain having
to always build from a toplevel dir. see all the issues with efl doing
this.