Contains initial support for OpenCL.DebugInfo.100 extended instruction set

Changes:
  8aa423930 Avoid pessimizing std::move (#3124)
  fad92f1e7 Fix typo in validation message (#3122)
  578c5ac13 Change default version for CreatInstBindlessCheckPass to 2 (#3119)
  9215c1b7d Fix convert-relax-to-half invalid code (#3099) (#3106)
  64f36ea52 Support OpenCL.DebugInfo.100 extended instruction set (#3080)
  e01bc6d4e spirv-fuzz: Always add new globals to entry point interfaces (#3113)
  dcb7169bb spirv-fuzz: Transformation to add a new function to a module (#3114)
  2e41d5ece spirv-fuzz: Avoid passing access chains as parameters (#3112)
  e70b009b0 Add support for SPV_KHR_non_semantic_info (#3110)
  38d7fbaad spirv-fuzz: Transformations to add types, constants and variables (#3101)
  fccbc00ac Make Instrumentation format version 2 the default (Step 1) (#3096)
  96354f504 spirv-fuzz: Fuzzer pass to merge blocks (#3097)
  5c019b592 Start SPIRV-Tools v2020.1
  c413b982c Finalize SPIRV-Tools v2019.5
  2afbe9051 Update CHANGES
  00ca4e5bd Don't crash when folding construct of empty struct (#3092)
  0a2b38d08 spirv-fuzz: function outlining fuzzer pass (#3078)
  983b5b4fc spirv-fuzz: Use validator to check break/continue dominance conditions (#3089)
  e82a42860 WebGPU: Array size at most max signed int + 1 (#3077)
  0a5d99d02 Permit the debug instructions in WebGPU SPIR-V - remove from the optimizer (#3083)
  af7410597 graphics robust access: use signed clamp (#3073)
  3ed458604 Folding: perform add and sub on mismatched integer types (#3084)
  47f3eb426 spirv-fuzz: Fix invalid tests (#3079)
  b334829a9 Validate nested constructs (#3068)
  52e9cc930 spirv-fuzz: Improve debugging facilities (#3074)
  54385458c Handle unreachable block when computing register pressure (#3070)
  868ca3954 Improve RegisterSizePasses (#3059)
  f31f26f73 utils/vscode: Add install.bat (#3071)
  03957e8a9 build: cmake: Add support for Fuchsia. (#3062)
  a62012ced Add test with explicit example of stripping reflection info (#3064)
  8312c523e Permit the debug instructions in WebGPU SPIR-V (#3063)
  85f3e93d1 Respect CMAKE_INSTALL_LIBDIR in installed CMake files (#3054)
  45dde9ad6 Add missing dealloc (#3061)
  2ee9aaa28 Initialize binary for use as guard later (#3058)
  0391d0823 Handle OpPhi with no in operands in value numbering (#3056)
  ca703c887 Kill the id-to-func map after wrap-opkill (#3055)
  57b4cb40b Convert stderr and stdout in status to strings on assignment (#3049)

Commands:
  git subtree pull --prefix third_party/SPIRV-Tools https://github.com/KhronosGroup/SPIRV-Tools master --squash

Bug: b/123642959
Change-Id: Id1120acb6126f62c3928774c985fcc09d2619584