`FuzzerPassInterchangeSignednessOfIntegerOperands` and `FuzzerPassInterchangeZeroLikeConstants` both included specialization constants when trying to find integer constants with known values. However, this is incorrect behavior because we do not know the value of specialization constants. Furthermore, ConstantManager does not support them, and this led to crashes where we assumed we could look up specialization constants via the ConstantManager.

This change fixes both passes to ignore specialization constants.

Fixes KhronosGroup#3663.

Roll third_party/glslang/ b60e067..f257e0e (11 commits)

KhronosGroup/glslang@b60e067...f257e0e

$ git log b60e067..f257e0e --date=short --no-merges --format='%ad %ae %s'
2020-08-14 john Build: fix a build warning
2020-08-14 rafael.fariasmarinheiro Use --test-root to pass files to Bazel tests.
2020-08-14 john Fix KhronosGroup#2366, fix KhronosGroup#2358, correctly separate out numerical feature checking
2020-08-14 john Non-functional (almost): Refactor when 'extensionRequested' is called.
2020-08-14 john Non-functional: Remove reinventing the scalar type, note code issues
2020-08-11 john Non-functional: spellings of "destinaton" and "addPairConversion"
2020-08-12 alanbaker Update test expectations
2020-08-12 alanbaker Update SPIRV-Tools and SPIRV-Headers known good
2020-08-10 ezdiy GLSLANG_EXPORT for C APIs.
2020-08-07 john Non-functional: correctly do GL_EXT_buffer_reference2 semantic checking
2020-08-06 john Non-functional: consistently use 'const TSourceLoc&' to pass location.

Created with:
  roll-dep third_party/glslang

Roll third_party/googletest/ 3af06fe16..adeef1929 (4 commits)

google/googletest@3af06fe...adeef19

$ git log 3af06fe16..adeef1929 --date=short --no-merges --format='%ad %ae %s'
2020-08-12 krzysio Googletest export
2020-08-11 absl-team Googletest export
2020-08-11 dmauro Googletest export
2020-08-10 absl-team Googletest export

Created with:
  roll-dep third_party/googletest

Roll third_party/spirv-cross/ 82d1c43e4..4c7944bb4 (1 commit)

KhronosGroup/SPIRV-Cross@82d1c43...4c7944b

$ git log 82d1c43e4..4c7944bb4 --date=short --no-merges --format='%ad %ae %s'
2020-08-13 lehoangq Fix KhronosGroup#1445: MSL: Enclose args when convert distance(a,b) to abs(a-b)

Created with:
  roll-dep third_party/spirv-cross

Roll third_party/spirv-tools/ 2990a21..b8de4f5 (19 commits)

KhronosGroup/SPIRV-Tools@2990a21...b8de4f5

$ git log 2990a21..b8de4f5 --date=short --no-merges --format='%ad %ae %s'
2020-08-16 jaebaek Allow DebugTypeTemplate for Type operand (KhronosGroup#3702)
2020-08-14 antonikarp spirv-fuzz: Improve code coverage of tests (KhronosGroup#3686)
2020-08-14 stefanomil spirv-fuzz: Fuzzer pass to randomly apply loop preheaders (KhronosGroup#3668)
2020-08-14 vasniktel spirv-fuzz: Support identical predecessors in TransformationPropagateInstructionUp (KhronosGroup#3689)
2020-08-13 alanbaker Improve non-semantic instruction handling in the optimizer (KhronosGroup#3693)
2020-08-13 vasniktel Fix the bug (KhronosGroup#3680)
2020-08-12 andreperezmaselco.developer spirv-fuzz: Check integer and float width capabilities (KhronosGroup#3670)
2020-08-12 andreperezmaselco.developer spirv-fuzz: consider additional access chain instructions (KhronosGroup#3672)
2020-08-12 andreperezmaselco.developer spirv-fuzz: Ignore specialization constants (KhronosGroup#3664)
2020-08-12 vasniktel Fix the bug (KhronosGroup#3683)
2020-08-12 vasniktel spirv-fuzz: Fix width in FuzzerPassAddEquationInstructions (KhronosGroup#3685)
2020-08-12 jaebaek Preserve debug info in dead-insert-elim pass (KhronosGroup#3652)
2020-08-12 jaebaek Validate more OpenCL.DebugInfo.100 instructions (KhronosGroup#3684)
2020-08-11 alanbaker Only validation locations for appropriate execution models (KhronosGroup#3656)
2020-08-11 andreperezmaselco.developer spirv-fuzz: Fix in operand type assertion (KhronosGroup#3666)
2020-08-11 andreperezmaselco.developer spirv-opt: Add spvOpcodeIsAccessChain (KhronosGroup#3682)
2020-08-11 vasniktel spirv-fuzz: FuzzerPassPropagateInstructionsUp (KhronosGroup#3478)
2020-08-10 stevenperron Handle no index access chain in local access chain convert (KhronosGroup#3678)
2020-08-10 rharrison Roll 2 dependencies (KhronosGroup#3677)

Created with:
  roll-dep third_party/spirv-tools