Section 3-chroot/072-grub - need check mess in re-link (needed as.gnu also)

[Cerberios]

In section 3-chroot/072-grub

Build still tries to use clang. Temporarily switch to GCC
mv -v /usr/bin/{gcc,gcc.clang}
ln -sv gcc.gnu /usr/bin/gcc

There a little mess.

1. It shows "/usr/bin/gcc - no such file"
   Need to add ln -sv gcc.gnu /usr/bin/gcc
2. Reg. this instruction, configure fails with "wrong assembler" - it looking at "as from clang", not GNU
   I added ln -sv /usr/bin/as.gnu /usr/bin/as
   After these fixes configuration and compile OK

[andzai1995]

Read #23