Makefile improvements.
Makefile improvements.

You can now use "make" to build Nu from scratch.
The Makefile first builds mininush, a limited version
of the Nu shell, and then uses mininush to run nuke
to complete the build.  From then on, you can just
nuke everything.

nulang/nu,timburks/nu,jsyedidia/nu,jsyedidia/nu,spotify/nu,heiko-henrich/nutor,jsyedidia/nu,timburks/nu,spotify/nu,jsyedidia/nu,gcbeyond/nu,hodgeswt/nu,jqk6/nu,gcbeyond/nu,alloy/nu,timburks/nu,jqk6/nu,spotify/nu,spotify/nu,hodgeswt/nu,gcbeyond/nu,alloy/nu,gcbeyond/nu,heiko-henrich/nutor,hodgeswt/nu,hodgeswt/nu,nulang/nu,heiko-henrich/nutor,heiko-henrich/nutor,jqk6/nu,nulang/nu,jsyedidia/nu,jqk6/nu