The fuzzer runtime is not present for darwin host modules, disable
cc_fuzz modules when targeting darwin.
Test: m on darwin
Change-Id: I9da319e00e36c3e0a5912329de7890a6409f1a55
Adds the cc_fuzz target via a cc_fuzz module. Also implements the
libclang runtime interface for the x86 toolchain to allow host-built
fuzzers.
Bug: 133261679
Bug: 137398545
Test: Build a fuzzer (with all topic patches), notice that you now
have a host-built fuzzer :)
Change-Id: I7fa069603415f40b3f12a002c253fca6e2aa1988