Rename the `${SPIRV_TOOLS}` target to `${SPIRV_TOOLS}-static` and alias `${SPIRV_TOOLS}` to either `${SPIRV_TOOLS}-static` or `${SPIRV_TOOLS}-shared` depending on `BUILD_SHARED_LIBS`.

Re-point all internal uses of `${SPIRV_TOOLS}` to `${SPIRV_TOOLS}-static`.

`${SPIRV_TOOLS}-static` is explicitly renamed to just `${SPIRV_TOOLS}` to ensure the name does not change from current behavior.

Build the `SPIRV-Tools-*` libraries as static, as this is what they always were.

Force the external targets `gmock` and `effcee` to be built statically. These either do not support being built as shared libraries, or require special flags.

Issue: KhronosGroup#3482

* Rolling 2 dependencies and updating expectations

Roll third_party/spirv-cross/ 6575e451f..0376576d2 (5 commits)

KhronosGroup/SPIRV-Cross@6575e45...0376576

$ git log 6575e451f..0376576d2 --date=short --no-merges --format='%ad %ae %s'
2020-07-22 tommek Enabling setting a fixed sampleMask in Metal fragment shaders.
2020-02-20 cdavis MSL: Add support for processing more than one patch per workgroup.
2020-07-22 dsinclair Roll GLSLang, SPIRV-Headers and SPIRV-Tools.
2020-07-22 cdavis MSL: Factor creating a uint type into its own method.
2020-07-22 cdavis MSL: Factor a really gnarly condition into its own method.

Created with:
  roll-dep third_party/spirv-cross

Roll third_party/spirv-tools/ 969f028..b63f0e5 (13 commits)

KhronosGroup/SPIRV-Tools@969f028...b63f0e5

$ git log 969f028..b63f0e5 --date=short --no-merges --format='%ad %ae %s'
2020-07-27 rdb Fix SyntaxWarning in Python 3.8 (KhronosGroup#3388)
2020-07-27 bclayton CMake: Enable building with BUILD_SHARED_LIBS=1 (KhronosGroup#3490)
2020-07-27 dneto Avoid operand type range checks (KhronosGroup#3379)
2020-07-27 jaebaek Preserve debug info in scalar replacement pass (KhronosGroup#3461)
2020-07-27 pierremoreau Update OpenCL capabilities validation (KhronosGroup#3149)
2020-07-27 stevenperron build(deps): bump lodash from 4.17.15 to 4.17.19 in /tools/sva (KhronosGroup#3596)
2020-07-27 antonikarp spirv-fuzz: adds TransformationReplaceLoadStoreWithCopyMemory (KhronosGroup#3586)
2020-07-27 jaebaek Preserve OpenCL.DebugInfo.100 through private-to-local pass (KhronosGroup#3571)
2020-07-27 stefanomil spirv-fuzz: Relax type checking for int contants (KhronosGroup#3573)
2020-07-27 stefanomil spirv-fuzz: Generalise transformation access chain (KhronosGroup#3546)
2020-07-27 stefanomil spirv-fuzz: Split blocks starting with OpPhi before trying to outline (KhronosGroup#3581)
2020-07-27 afdx spirv-fuzz: Set message consumer in replayer when shrinking (KhronosGroup#3591)
2020-07-24 vasniktel spirv-fuzz: Don't use default parameters (KhronosGroup#3583)

Created with:
  roll-dep third_party/spirv-tools

* Add in missing expectations update