- This change also allows redeclaration of gl_PrimitiveIndicesNV and
  adds error checks against incorrect explicit array size.
- Also modifies gtests to check array bound limits and redeclare gl_PrimitiveIndicesNV[].

Add option to unwrap I/O block aggregates in reflection

* We follow similar rules to uniform block exploding.

Also added a warning for no space after a macro name.

Opt-in improvements to reflection interface

Add missing support for gl_MeshViewCountNV/gl_MeshViewIndicesNV in task shaders

Update SPIRV-Tools and tests expectations

* The stages mask is more fine-grained, and each variable or block's mask
  indicates which stages it's active in.

* Also note the uniform indices of atomic counter buffers

* We add an option to reflect inputs from other stages than vertex, if only a
  later subset of the stages is linked into the program.

* This is as expected by ARB_program_interface_query

* This comes from the resolution of issues 4, 5 & 6 in
  ARB_program_interface_query, stating that uniform buffers should have their
  members expanded out as normal and arrays should have elements added.
* If a buffer block has a large array e.g. [10000] we don't want to iterate over
  every array element. Instead we should only expand out the first [0] element,
  then expand as normal from there.
* The array name should still be appended with [0] to indicate that it's an
  array.

* Forwarding functions are left to preserve source compatibility with code using
  the old queries.

ParseHelper: don't assign xfb_offset for struct members

Add 8-bit/16-bit transform feedback support for future use

Use relative include paths in StandAlone/ResourceLimits.h

Switched to std::string for TReflection and TObjectReflection

Port Unix/ossource.cpp to Fuchsia

Fix a couple of warnings clang found

Disable Clang extra semicolon warning.

In MSVC 2017 Debug mode when a reflection is deleted (when a shader goes out of scope) xutility will fail to clear the children due to the TString allocator implementation. By switching to std::string xutility no longer throws the error.

This commit undoes the code on the commit "ParseHelper: assign
xfb_offset for struct members too" (commit
af8c1bdb), except the method renaming,
and updates the tests.

During the review of the implementation of Vulkan extension
VK_EXT_transform_feedback for the Linux Intel driver, it was pointed
that the Vulkan environment spec for SPIR-V only ever refers to block
or block members being decorated. It would be strange to not do the
same for OpenGL (ARB_gl_spirv). That would also fit better to what
GLSL does, where setting explicit xfb offsets for struct members is
not allowed.

FWIW, the original patch was proposed based on the fact that
ARB_gl_spirv is relying on OpenGL for how xfb offsets should be
assigned to members, and it was not clear (at least to me) which is
the responsible of such.

Fuchsia has pthreads but doesn't have sys/resource.h and doesn't
implement pthread_cleanup_push().

ANGLE bug: 2475

Usually this warning is disabled by default. But when turned on Clang
complains about extra semicolons in Glslang headers. Turn this off for
now. See http://crbug.com/926235

Add support for GL_EXT_YUV_target

Hopefully, this fixes the sudden new breakage with the bots.