Add minimal-runtime support for integer overflows.

Adds Make support for -fsanitze-minimal-runtime when using
the integer overflow sanitizers. This makes the crashes due to these
sanitizers less mysterious. This also cleans up the handling of the
integer_overflow flag.

Bug: 64091660
Test: Compiled and checked the generated compiler commands
Test: Checked program that overflows for the abort reason
Test: Checked integer_overflow flag still emits overflow checks

Change-Id: I11012ed0cbbf51935f549a08bd17109b5ce6f330