Fixes #1295.

Tokens that are accepted by any version of HLSL or GLSL should be
allowed when #ifdef'd off, such that errors are not reported.

WIP: Implement SPV_GOOGLE_hlsl_functionality1.

Enabled via -fhlsl_functionality1

Add support for GL_NV_shader_noperspective_interpolation

Fix conversions

Use the correct type for the constant for matrix/scalar division

The base and shift amount need to be integers, but not of the same type.
This fixes #1296 and replaces #1297.

Historically, addConversion() was split to handle binary node <-> node conversions
from non-binary node -> type conversions. However, the split wasn't entirely clean
WRT HLSL design and left duplication of case statements, which are misleading, and
this commit cleans up.

Reinforces that conversion rules are operation-specific.
Side effect is that HLSL logical-operator conversions are more direct
(e.g. float -> bool, rather than float -> int -> bool).

Fix build several build errors

glslang/SPIRV/SpvBuilder.cpp:2533:27: error: comparison of integers of different signs: 'int' and 'size_type' (aka 'unsigned long') [-Werror,-Wsign-compare]
        for (int c = 0; c < accessChain.swizzle.size(); ++c)
                        ~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

glslang/hlsl/hlslParseHelper.cpp:69:5: error: field 'cullDistanceInput' will be initialized after field 'clipDistanceOutput' [-Werror,-Wreorder]
    cullDistanceInput(nullptr),
    ^
1 error generated.

glslang/glslang/MachineIndependent/attribute.cpp:85:16: error: comparison of integers of different signs: 'int' and 'size_type' (aka 'unsigned long') [-Werror,-Wsign-compare]
    if (argNum >= args->getSequence().size())
        ~~~~~~ ^  ~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Replace en-dash with simple ASCII hyphen

* This means the source file is ASCII instead of (assumed) UTF-8 and
  doesn't cause warnings when compiling on non-western codepages.

When a matrix is divided by a scalar it tries to take the reciprocal
of the scalar to convert the operation into a multiply. However it was
always doing this by making a 32-bit constant. If the scalar is a
double then this would end up making an FDiv instruction with
different types in the operands.

This patch adds a helper method called makeFpConstant which makes a
floating-point constant of the given type. The code to take the
reciprocal now uses it to make the same type as the result.

Fixes https://github.com/KhronosGroup/glslang/issues/1278

Update known_good to SPIR-V 1.3 support

HLSL: Correct some mistakes for min16 types

include/Common.h: reorder includes to avoid redefinition on some platforms

- Add missing constructor ops to support float16/int16/uint16 types
- Allow half float literals
- Correct two errors of double literal parse in HLSL: extension check and
  postfix

On some systems sstream defines snprintf, this leads to the a redefinition of sprintf_s if snprintf is defined before checking if it exists in sstream.

Fix memory leak upon ProcessDeferred failure.

Allow --hlsl-enable-16bit-types to be used without AMD_EXTENSIONS

Fixed GCC+Clang errors and warnings on Linux and OSX.

Merge branch 'fixup_sm_60_wording' of https://github.com/sheredom/glslang into sheredom-fixup_sm_60_wording

Now, version 5.* is all connected to making the uint type, which doesn't quite work.
Generator versions 4 and 6 do not do this.

SPV: Implement Vulkan 1.1 features and extensions.