Fix issue #1367 - change the I/O remapper to ignore push constants so…

Fix issue #1367 - change the I/O remapper to ignore push constants so it does not apply a binding/descriptor set to them.

Update known-good.

Notably, reduces spirv-opt time and adds folding of OpDot and OpFNegate.

Initial way of addressing #1362.

Add AMD float16/int16 SPV extension string when GLSL specifies them

exp operand

Update spirv-opt known good

Fix issue #1350 - set the node type to match the atomic TIntermAggreg…

This patch makes  the validator accept *.<stage name>.[g/h]lsl pattern
for file names.

This patch preserves previous behavior (i.e. *.vert/*.frag/etc. in file
names still work).

Fix issue #1350 - set the node type to match the atomic TIntermAggregate node type so that AtomicSMin/Max is not generated with a result type of void.

Changes include:
    Fix SSA rewrite for nested loops.
    Add support for two new extensions:
    - SPV_NV_shader_subgroup_partitioned
    - SPV_EXT_descriptor_indexing
    Legalize OpImageTexelPointer
    Copy propagate arrays

Allowed for LIB_TYPE to be set to switch between static and shared libs for glslang, SPIRV, and HLSL

HLSL: Fix #1332: consistently use uint for counter buf typing.

fix VS2012 compile issues

This reverts commit e7350423.

Minor cleanup in ShaderLang.cpp

Use unique_ptr to simplify memory management in ProcessDeferred.