Rename tabtest.c and v3nametest.c

The binaries for these already have underscores in, best to have the
source files match.

Change-Id: I32a419f32ec7786fe2537d061eb0706a7bc73f4a
Reviewed-on: https://boringssl-review.googlesource.com/5101
Reviewed-by: Adam Langley <agl@google.com>
3 files changed