Revert: Revert r227804: Use fseek/ftell instead of fseeko/ftello when Newlib is the libc

EricWF has updated the compilers on his buildbots. Hopefully they won't crash now.

llvm-svn: 227971
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 07d9d76a2d79e080f7cd022755c4f963d71cc529
2 files changed