fix "not" precedence in ax.boot
Previously, the compilation of libaxiom.al would fail when src/interp/ax.boot was compiled via bootsys instead of depsys. The binding power of "not" in bootsys is much stronger than it was in depsys.
Authored by: hemmecke 2011-10-18
Parent: [r1174]
Child: [r1176]