FilterPolicy consolidation, part 1/2 (#5963)

Summary:
The parts that are used to implement FilterPolicy /
NewBloomFilterPolicy and not used other than for the block-based table
should be consolidated under table/block_based/filter_policy*. I don't
foresee sharing these APIs with e.g. the Plain Table because they don't
expose hashes for reuse in indexing.

This change is step 1 of 2:
(a) mv table/full_filter_bits_builder.h to
table/block_based/filter_policy_internal.h which I expect to expand
soon to internally reveal more implementation details for testing.
(b) consolidate eventual contents of table/block_based/filter_policy.cc
in util/bloom.cc, which has the most elaborate revision history
(see step 2 ...)

Step 2 soon to follow:
mv util/bloom.cc table/block_based/filter_policy.cc
This gets its own PR so that git has the best chance of following the
rename for blame purposes. Note that low-level shared implementation
details of Bloom filters are in util/bloom_impl.h.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5963

Test Plan: make check

Differential Revision: D18121199

Pulled By: pdillinger

fbshipit-source-id: 8f21732c3d8909777e3240e4ac3123d73140326a

1 files changed, 0 insertions, 1 deletions

diff --git a/src.mk b/src.mk
index 560f06202..85fd83c24 100644
--- a/src.mk
+++ b/src.mk
@@ -166,7 +166,6 @@ LIB_SOURCES =                                                   \
   util/concurrent_task_limiter_impl.cc                          \
   util/crc32c.cc                                                \
   util/dynamic_bloom.cc                                         \
-  util/filter_policy.cc                                         \
   util/hash.cc                                                  \
   util/murmurhash.cc                                            \
   util/random.cc                                                \