Implement GLSL_EXT_shader_atomic_float2

Implement the extension GL_EXT_spirv_intrinsics

Remove output variables from compute regression tests

Output variables in GLCompute shaders is not supported in Vulkan.
Recent upgrade of spirv-tools revealed this problem.

Update SPIRV-Tools and SPIRV-Headers

Fix SPIR-V remapper not remapping OpExtInst instruction set IDs

Add support for float spec const vector initialization

Fixes #2025

- Add support of SPIR-V execution mode qualifiers.
- Add support of SPIR-V storage class qualifier.
- Add support of SPIR-V decorate qualifiers.
- Add support of SPIR-V type specifier.
- Add support of SPIR-V intruction qualifiers.
- Add support of spirv_by_reference/spirv_literal parameter qualifier.
- Add shader stage macros introduced by this extension.

Update spirv tools and unit tests

Implement GL_EXT_subgroup_uniform_control_flow.

Add setters for true and false blocks of selection nodes, copying the pattern already used for the condition.

Fix OOB write in matrix constructor

Fix UBSAN error with negating 0x8000'0000

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>

In a matrix constructor that takes a number of components, as many
components as necessary must be taken, with the rest discarded, as GLSL
allows more components than necessary to be specified.  For example, the
following:

    mat4 m4 = mat4(v4, v4.yzwx, v4.zwx, v4.zwxy, v4.wxyz);

is equivalent to:

    mat4 m4 = mat4(v4, v4.yzwx, v4.zwx, v4.zwxy, v4.w);

glslang takes the components from the constructor and builds the single
components of the matrix in a 2D array before constructing the matrix
itself.  It however did not check for extra parameters and was thus
writing OOB to said 2D array.  This is fixed in this change
Signed-off-by: Shahbaz Youssefi <shabbyx@gmail.com>

Add setters for true and false blocks of selection nodes, copying the pattern already used for the condition.

Add missing libs to release

GenericCodeGen, MachineIndependent and glslang-default-resource-limits

Fixes #2648

Do true SPV type check for function array arg linkage

Previous check was missing type difference between uniform array
actual arg with stride decoration and the formal arg without. Now
does logical or component-wise copy where needed.

Fixes #2637

Fix mat4x2(scalar) constructor.

fix error message for hlslGrammar::acceptConstructor

Dont export inline TObjectReflection::getType()

Fix the error message for when an erroneous HLSL constructor statement
is detected.

Prior to this change, such error messages would not show correct file
path and line number information.

Additionally, update test data to account for updated error messages.

Fixes mingw build 
Closes #2460

Fix arrays dimensioned with spec constant sized gl_WorkGroupSize

Add support for 64bit integer types and 64bit integer vector types to bitCount() builtin

Set CMake policy CMP0054 to NEW to silence warning

Fixes #2630

CMAKE_SYSTEM_NAME variable might evaluate to existing variable such as
CYGWIN. This setting also matches with SPIRV-Tools.