README - memory map table now renders in github flavored markdown
Merge branch 'master' of https://github.com/projectgus/fernly
README: Make instructions clearer

Signed-off-by: Sean Cross <xobs@kosagi.com>
Makefile: Add _lshrdi3.S

Signed-off-by: Sean Cross <xobs@kosagi.com>
mkenv: Move away from clang

It was nice, but it isn't as good at cross-compiling yet.  Plus, by sticking
with gcc, we have one compiler throughout the entire system.

Signed-off-by: Sean Cross <xobs@kosagi.com>
bionic: Fix build with gcc

Signed-off-by: Sean Cross <xobs@kosagi.com>