[libFuzzer] Do not optimize minimize_two_crashes.test.
Speculative fix for build bot breakage on Mac.
# Test that the minimizer stops when it sees a differe bug.
UNSUPPORTED: freebsd
-RUN: %cpp_compiler %S/TwoDifferentBugsTest.cpp -o %t-TwoDifferentBugsTest
+RUN: %cpp_compiler -O0 %S/TwoDifferentBugsTest.cpp -o %t-TwoDifferentBugsTest
RUN: rm -rf %t && mkdir %t
RUN: echo H12345678901234667888090 > %t/long_crash
