[WASM] Add Less, LessEqual, LogicalAnd, Tile.

[nsthorat]

Note that the implementation of Tile is the naive implementation. This can be made faster with memcpys (or xnnpack).

These are the final ops needed for AutoML object detection.

This change is 

[dsmilkov]

Awesome to have support for AutoML Object!

Reviewed 27 of 27 files at r1.
Reviewable status: complete! 1 of 1 approvals obtained (waiting on @annxingyuan, @dsmilkov, and @nsthorat)

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tfjs-backend-wasm/src/cc/kernels/Tile.cc, line 27 at r1 (raw file):

namespace {
template <typename T>
void tile(const T* x_data, const std::vector<size_t>& x_shape,

rename to tileSlow for consistency with the other kernels

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tfjs-core/benchmarks/index.html, line 87 at r1 (raw file):

    </table>
  </div>
  <script src="/tfjs-core/dist/tf-core.js"></script>

revert these changes

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tfjs-core/src/backends/tile_impl.ts, line 38 at r1 (raw file):

    const originalLoc: number[] = new Array(xBuf.rank);
    for (let j = 0; j < originalLoc.length; j++) {

just double checking, this wasn't a bug because the scoping of let, right?

[nsthorat]

Reviewable status: complete! 1 of 1 approvals obtained (waiting on @annxingyuan and @dsmilkov)

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tfjs-backend-wasm/src/cc/kernels/Tile.cc, line 27 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

rename to tileSlow for consistency with the other kernels

Done

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tfjs-core/benchmarks/index.html, line 87 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

revert these changes

Done

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tfjs-core/src/backends/tile_impl.ts, line 38 at r1 (raw file):

Previously, dsmilkov (Daniel Smilkov) wrote…

just double checking, this wasn't a bug because the scoping of let, right?

Correct, not a bug because of scoping but just confusing when reading :)