Fix GCC 4.8.5 build by avoiding braced default member initializer
Fix GCC 4.8.5 build by avoiding braced default member initializer

Use internal_memset instead.  Should revive all Linux Chromium ToT bots.

git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@333678 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