Texture dimensions larger than SHRT_MAX (32767)
were not supported by SwiftShader. Used integers
instead of shorts to store texture sizes to
increase the maximum texture size to INT_MAX
(2147483647).

Tests: dEQP-VK.memory.pipeline_barrier.host_write_uniform_texel_buffer.*
Tests: dEQP-VK.memory.pipeline_barrier.transfer_dst_uniform_texel_buffer.*

Bug b/133429305

Change-Id: I7913f5f4c1f933889e74c57851a837ad7982f87a
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31989Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>