[sanitizer_common] Fuchsia now supports .preinit_array
[sanitizer_common] Fuchsia now supports .preinit_array

Support for .preinit_array has been implemented in Fuchsia's libc,
add Fuchsia to the list of platforms that support this feature.

Differential Revision: https://reviews.llvm.org/D52155

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@342357 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