Binary size optimization

[xarantolus]

Just looked at the hello world example binary, and it seems to contain ~65KB of just null bytes:

$ LC_ALL=C tr -c '\0' '\n' < hello-world.bin | awk 'length > max {max=length} END {print max+0}'
65536

We probably want to look into this

Edit: seems to mostly be from alignment at the end of the build, maybe we want to change this:

info: Adding section: offset=0x0, size=0x9f60, align=65536
info: Adding section: offset=0x9f60, size=0x22414, align=65536