Kernel Build Script. fixing and removing usseless brakets!

We need to set brakets only in case we need to protect dynamic value
from chars that not belong to this value.

example:

TEST=`cat /tmp/test`;
echo "stupid${TEST}info"

in condition as this:

echo "stupid $TEST info"
we dont need brakets.

also fixed BUG with initramfs temp cleaning... maybe solved the dead
kernel bug!