[vcpkg baseline] Update hash for otl

[NancyLi1013]

otl failed on current CI due to wrong hash. I can also reproduce this on my local machine.

The errors like this:

-- Using cached C:/vsts/_work/4/s/downloads/otlv4_40451.zip
CMake Error at scripts/cmake/vcpkg_download_distfile.cmake:99 (message):
  

  File does not have expected hash:

          File path: [ C:/vsts/_work/4/s/downloads/otlv4_40451.zip ]
      Expected hash: [ add1e54fae20175461d5f09cbe324e98b6f6a3839356136811109cf3251ca96541c101816870c6cc15d7611ad6bf9d576ac8dfce4274419b30866955c5892d15 ]
        Actual hash: [ 74499b79a756c1ecc16d6bd9b277b91add55249d2e1cb65a31786e9750ff607da1222797f318954599efc5153cecee2d3a7fd1e994c09e7ddb2507c8e5ce5c55 ]

  Please delete the file and retry if this file should be downloaded again.

Call Stack (most recent call first):
  scripts/cmake/vcpkg_download_distfile.cmake:110 (test_hash)
  ports/otl/portfile.cmake:3 (vcpkg_download_distfile)
  scripts/ports.cmake:90 (include)

So I update the hash to fix this.

[BillyONeal]

Note that this change was also applied to #10828 but I did not bump the package version number. I'm guessing that the only thing they changed was the copyright date on the header.

[c72578]

The contents of the packed file otlv40451.h inside otlv4_40451.zip stayed exactly the same. However, the file modification date of otlv40451.h was changed by one hour, causing a difference in the zip file and therefore different SHA512 hashes. It seems, that it was zip packed again after switching to summer time/Daylight saving time (DST).

Original, released zip file:
otlv4_40451.zip
SHA512: add1e54fae20175461d5f09cbe324e98b6f6a3839356136811109cf3251ca96541c101816870c6cc15d7611ad6bf9d576ac8dfce4274419b30866955c5892d15

Current, modified zip file:
otlv4_40451_modified_2020-03-27.zip
SHA512: 74499b79a756c1ecc16d6bd9b277b91add55249d2e1cb65a31786e9750ff607da1222797f318954599efc5153cecee2d3a7fd1e994c09e7ddb2507c8e5ce5c55