math.mk supports larger number comparison

To support 6-digit version format, extend the integer limit for
the comparison functions. It keeps the simple fast comparisons for
integers <= 100, but uses the extended functions for larger numbers.

Bug: 295269182
Test: make -f math.mk RUN_MATH_TESTS=true
Change-Id: Ib0752fbeb0a80796aeca663b0dc6bda0fd339440