Before, it was only including explicit interface, sufficient for IO-Block-declared
oriented interface, but not sufficient for all modes GLSL might be used with
SPIR-V.

Two things are accomplished now:
1) each id will appear exactly once
2) the OpEntryPoint list will union static use with declarations

This includes doing structure uniqueness modulo majorness, for shared nested structures.

This also distinguishes between the same struct included in multiple parent packings.

SPV: Fix an issue related with imageStore() for 2DMS.

Parser: Correct the storage qualifier of gl_HelperInvocation.

SPV: Implement GLSL built-in bitcast functions.

Display the filename if we have output, even if validating  a single file

This also made the function easier to read by identifying
left and right operands more clearly.

Fix compile warning/error due to assignment in while() loop

This causes build failures with -Werror=parentheses

An extra line of error recovery code set a non-sense combination of
es version and core profile.

'invocations' was using 0 as the "shader never set" flag and as the
default. Formalize this and explicit set to 1 and link time.

To do this, more generally use a named -1 as a not set value.

SPV: Smear should use type of the scalar to make the expected vector type when the provided vector type is incompatible with the scalar.

Parser: Extension requirement of gl_PrimitiveID and gl_Layer should be checked only for ESSL instead of GLSL.

expected vector type when the provided vector type is incompatible with
the scalar.

Parser: Extension requirement of gl_PrimitiveID and gl_Layer should be checked only for ESSL instead of GLSL.

SPV: Implement GLSL interpolation built-in functions.

Dealing with the 110 toolset seems not worth it.

Avoid read past end of operands vector for EOpFrexp

When emitting SPIR-V code for frexp, avoid access
beyond the end of the operands vector.  When constructing
the OpExtInst, construct a new arguments vector instead of
modifying the existing operands vector.  In the case of OpFrexp,
well need that last operand later on to generate the store.

Fixes https://github.com/KhronosGroup/glslang/issues/110

Change-Id: Ibc380fadf5e600ac491932e9ecef7afe2d72fd7f

SPV: Distinguish between std140 and std430 layouts, and correctly use alignments as the base for strides.