Fixes #2106

* Convert memcmps to strcmps

EXT_debug_printf - make escape sequences better match C/C++

Allow nonuniformEXT() on sampler types

disable escape sequences for #line and #error

This is conservative and still also decorates the loaded value.

Also add missing NonUniformEXT decoration on OpImageTexelPointer.

Fix typo in Web CMakeLists

Add Android build instructions to README

add c wrapper for standalone ResourceLimits and remove that dependency from glslang_c_interface

Fix for #2099: add c interface support for TBuiltInResource and glslang::DefaultTBuiltInResource

GL_EXT_debug_printf implementation

Includes an additional deprecation and rationalizing the beginning sections.

In GLSL/HLSL/AST,  v.zyx is an l-value, but not in SPIR-V, which cannot represent it.
So, a temporary is used instead.

This also made it obvious some code was (functionally correctly)
repeated, so deleted that too.

Add vcpkg installation instructions

Fix for #2075: removed DefaultTBuiltInResource from glslang_c_interface.cpp

Fix an issue of SPV generation for imageAtomicStore.

For GLSL function imageAtomicStore, it will be translated to
OpImageTexelPointer + OpAtomicStore. The result type of
OpImageTexelPointer must be the same as the sampled type of OpTypeImage.
On translation, the result type is mistakenly fetched from operand list
operands[2] while operands[2] corresponds to sampleNum whose type is
always uint. This leads to an error if the image type is iimageXXX that is
int image.

SPV_AMD_shader_image_load_store_lod is now validated by spirv-tools

Fix iomapper issue

Use type name to index map to instead of use instance name to index map, or anonymous block will cause a map issue.

HLSL: Fix part of #2070: Correctly handle promotion for <unary-op>(int).

This still only handles a scalar correctly, and some
vector cases need additional fixes.