Apparently Windows' .lib files are also ar. Add tests.

Change-Id: Ie35f410268086b8fe6d4d1b491de3f30a46309dd
Reviewed-on: https://boringssl-review.googlesource.com/c/33348
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

One less bit of special-casing in read_symbols.go. We filter out the
sysv-style symbol table, so we should filter out the macOS one too.

Add tests for util/ar to cover this and the Linux case.

Change-Id: Id16d8b0526c1b6e0149df1df4006848d7b3a4b2f
Reviewed-on: https://boringssl-review.googlesource.com/c/33347
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>

- Add util/read_symbols.go to read exported symbols from an AR
  file for use with the symbol prefixing feature
- Move util/fipstools/fipscommon/ar.go -> util/ar/ar.go
- util/ar/ar.go: Support BSD-style AR files

Change-Id: I171b3b952e69c4b87ac04751b7dba3ea9bc2504e
Reviewed-on: https://boringssl-review.googlesource.com/32024
Reviewed-by: David Benjamin <davidben@google.com>

This makes running go test, etc., in util/fipstools/delocate work! This
adds a go_executable command to CMake like:

  go_executable(delocate boringssl.googlesource.com/boringssl/util/fipstools/delocate)

which internally gets dependencies and whatnot so it behaves like usual
Go.

Update-Note: delocate has been rearranged a bit.
Change-Id: I244a7317dd8d4f2ab77a0daa624ed3e0b385faef
Reviewed-on: https://boringssl-review.googlesource.com/31885
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
Reviewed-by: Adam Langley <agl@google.com>

This makes things a little easier for some of our tooling.

Change-Id: Ia7e73daf0a5150b106cf9b03b10cae194cb8fc5a
Reviewed-on: https://boringssl-review.googlesource.com/15104
Reviewed-by: Matt Braithwaite <mab@google.com>
Reviewed-by: Adam Langley <agl@google.com>

In typical style I forgot to push a new revision before
landing fd49993c3b. That change accidently
dropped patchset eight when I squashed David's changes in, so this
restores that and fixes a couple of 80-char issues in a Python script.

Change-Id: I7e9338a715c68ae5c89d9d1f7d03782b99af2aa8
Reviewed-on: https://boringssl-review.googlesource.com/14784
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

Change-Id: Ic3a91ccd2c8cdc364740f256fdb8a7ff66177947
Reviewed-on: https://boringssl-review.googlesource.com/14506
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>