[libFuzzer] Avoid fuzzer symbols being hidden.
[libFuzzer] Avoid fuzzer symbols being hidden.

Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1490845#c5.

Patch By: Mike Hommey

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@342423 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt