* [MLIR] Bump MLIR repo 8/20/2019

MLIR_
commit 0cdb20a6add19bc96c20dad28589a1e54e4d8469
Author: Lei Zhang <antiagainst@google.com>
Date:   Tue Aug 20 13:33:41 2019 -0700

    Add spv.specConstant and spv._reference_of

LLVM:
commit 3b9a27b6908040881dad394022f8c472c15c0784
Author: Simon Pilgrim <llvm-dev@redking.me.uk>
Date:   Tue Aug 20 17:54:37 2019 +0000

    Fix typo in comment. NFCI.

* Address Bob's feedback

* Segregate builders op wise

* Style

* Update ngraph.hpp

Modifying CI interface

Static type holders can be initialized after things that make copies of them
are run, leading to `undefined` as the type in the copies.

* Plant an updated .clang-format in src/ngraph, with overrides in each subdir thereof

* Whoops, forgot to commit the actual .clang-formats

* Remove src/ngraph/type/.clang-format (it was having no effect)

* Remove src/ngraph/distributed/.clang-format (it was having no effect)

* Remove src/ngraph/codegen/.clang-format (only one file was affected, so it's a wash)

* Remove src/ngraph/autodiff/.clang-format (only one file was affected, so it's a wash)

* Un-relax comment wrapping in src/ngraph/state

* Revert "Un-relax comment wrapping in src/ngraph/state"

This reverts commit 41fc50fb92bffb7f5aca4126eb1267f00dcca727.

* Un-relax comment wrapping in src/ngraph/runtime, not including src/ngraph/runtime/{cpu, gpu, plaidml, reference}

* Enable new clang-format comment rules for src/ngraph/runtime/{dynamic,generic_cpu,gpuh,interpreter,nop}

* Update clang-format comment rules for GPU BE

* Update clang-format comment rules for src/ngraph/runtime/plaidml

* Update clang-format comment rules for src/ngraph/runtime/intelgpu

* Fix a couple of demangles I missed

* rm zombie .clang-format files

* rm zombie .clang-format files

* Update CODEOWNERS

* Update CODEOWNERS

* Update CODEOWNERS

* Kill zombie .clang-format files

* Undo CODEOWNERS change

* New clang-format rules for src/ngraph/op/util

* Restore root .clang-format

* Remove redundant .clang-formats

* Revert "Remove redundant .clang-formats"

This reverts commit e158df1e507570b55348ce326fd7e8b4ae819f36.

* Remove redundant .clang-formats

Testing something

* mkl-dnn: patch update 0.20.2

* mkl-dnn: Update version patch.

* mkl-dnn: full version naming has changed.

* add virtual method to get version number from Backend

* style

* semicolon

Leona/doc v0.25.1

* Enable new clang-format comment rules for src/ngraph/runtime/{dynamic,generic_cpu,gpuh,interpreter,nop}

* Update clang-format comment rules for GPU BE

* Update clang-format comment rules for src/ngraph/runtime/plaidml

* Update clang-format comment rules for src/ngraph/runtime/intelgpu

* Fix a couple of demangles I missed

* First pass, remove QDot as experimental op, add it as core op, test case failing

* Change QuantizedMatmul API

* Tests for QuantizedDot passing, cleanup required

* Move test cases to backend_test.in.cpp

* Change reference dot API to take scale and zero point

* Onnx matmul integer tests passing

* Add validate_and_infer_types()

* Add more checks for QDot

* Add type prop tests

* Add interpreter support

* Add serializer support

* Disable tests in other backends

* Fix test and add codegen support

* Make axes optional argument

* Change fusion pattern

* Copyright

* merge changes

* more merge changes

* Fix more merge conflicts

* change builders to reflect new changes

* cleanup

* Add reduction_axes to the API

* Fix onnx test cases

* Remove debug comments

* Fix CI

* disable plaidml tests

* Remove comment