Convert pbkdf_test to C++11.

We don't really gain much from this one, but consistency.

Change-Id: I3f830c6d1ad65263bd1cc09372a5b810a8f690c0
Reviewed-on: https://boringssl-review.googlesource.com/4124
Reviewed-by: Adam Langley <agl@google.com>
3 files changed