Implemented C-language interface for glslang

Add Error check flag in io mapper

GLSL could detect contradictory uniform binding, but missing error reporting, even if we could now observe error inside infosink.

Add error check when first time validate uniform binding. When doing traversal, it should be zero error.

This error check flag will be used during linking time. To quickly report errors like contradictory uniform bindings.

Add error check flags for TDefaultGlslIoResolver when catching EPrefixInternalError

SPV/Vulkan: Add support for Vulkan 1.2, which defaults to SPIR-V 1.5.

Fix glslang can't link multiple AST in a single stage

Add support for ARB_gpu_shader_fp64

Fix #1829: Allow "--" options for def/undef, for OpModuleProcessed.

This allows OpModuleProcessed logging to be consistent with everything taking
"--" options.

FYI, move builtin check to type symbol check.
Avoid modifying interface doubleCheck().

Add missing extension defination

This micro should been defined 1, if opengl 2.0 is required.

Modify max binding checks for atomic_uint

Add builtin constants gl_MaxFragmentUniformVectors and gl_MaxVertexUniformVectors.

Add builtin constants:

gl_MaxFragmentUniformVectors and gl_MaxVertexUniformVectors.
They should both be available since version 410 for core.

GLSL Version : >= 150

Purpose:
Allow users to use features by enabling this extension, even in low versions.

Extension Name:
ARB_gpu_shader_fp64

Builtin-variables:
Nah

Builtin-functions:
functions overloaded for this extension, please check registry in reference.

Keywords:
Double

Features:
add support for type "double"

Reference:
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_gpu_shader_fp64.txt

Add support for implicit conversion

1. Remove builtin double vertex (this is introduced by vertex_attrib_64bit
2. Add extension check and implicit conversion as double has been introduced
3. Add test results.

Root cause:
GlslangToSpv use symbol structure's ptr as a map key, but multiple shader object can build a new AST.
In the AST the the same symbol has different ptr point to their structure, so indext map faild.

solution:
Add a new map glslangTypeToIdMap to map ptr to symbol id, and use symbol id to index memberRemapper.

Add support for ARB_uniform_buffer_object

Add support for ARB_texture_multisample

atomic counter offset should align to 4 (compute shader)

Add support for ARB_sample_shading

atomic counter offset should align to 4
Ref:
glspec46.core - 6.8 BufferObjectState
offset restriction multiple of 4

Modify atomic_uint binding check.

Currently, when not declared with offset, default atomic_unint won't check whether its binding is valid or not more than its limit value.

CInterface: added _BIT suffix to glslang_messages_t and glslang_reflection_options_t, fixed const-correctness