Merge commit '6dccd64de51ea960cb6f0d975768c874814b4c75' into HEAD

Update flatbuffers. Relevant merge tasks:
* A field got added to reflection.fbs; this had fallout in
  reflection_generated.h and the logger_test shas.
* Resolved merge conflict in rust/flatbuffers/src/lib.rs
* Reverted upstream change that made Table rust struct members private.
* FlatBufferBuilder Create*Vector calls now include alignment.
* nim codegen got added; needed to update to use scoped enums.

Main fix that motivated this update is
https://github.com/google/flatbuffers/pull/7588

Change-Id: I6bbe5d56846f426fa5f2a82c4f2bc77be2b93bb0
Signed-off-by: James Kuszmaul <james.kuszmaul@bluerivertech.com>
diff --git a/third_party/flatbuffers/src/reflection.cpp b/third_party/flatbuffers/src/reflection.cpp
index 7549859..5ddff63 100644
--- a/third_party/flatbuffers/src/reflection.cpp
+++ b/third_party/flatbuffers/src/reflection.cpp
@@ -689,9 +689,10 @@
             FLATBUFFERS_FALLTHROUGH();  // fall thru
           default: {                    // Scalars and structs.
             auto element_size = GetTypeSize(element_base_type);
+            auto element_alignment = element_size; // For primitive elements
             if (elemobjectdef && elemobjectdef->is_struct())
               element_size = elemobjectdef->bytesize();
-            fbb.StartVector(vec->size(), element_size);
+            fbb.StartVector(vec->size(), element_size, element_alignment);
             fbb.PushBytes(vec->Data(), element_size * vec->size());
             offset = fbb.EndVector(vec->size());
             break;