Update SPIR-V Tools, SPIR-V Headers and glslang

Update SPIR-V Tools, SPIR-V Headers and glslang

David Neto has kindly produced vulkan-1.1-dev branches for SPIR-V Tools
and SPIR-V Headers that match SPIR-V 1.3 functionality. This commit
updates us to those changelists.

In tandem I also updated glslang to the master commit on gitlab - this
is the tracking branch for Vulkan 1.1. Glslang had changed some of the
files, so I took the liberty of cleaning up the include process for
glslang to try and mitigate any future additions/removal of files, by
defensively setting some of glslang's CMake options to disable
functionality, and renaming glslang_library -> glslang_libraries to
include the 3 libraries the CTS depends on.

Components: Vulkan

Change-Id: I1a47ff96adbbcab5a89e7b9805ba53f783ecc693
(cherry picked from commit c4bf8571ff93212f7f07124531e144d6520dafda)