glslang -> SPV: Improvements in swizzles on access chains: Bug 14007 (wrong type), simplications, tests, support mixed swizzle with dynamic component selection.

git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31277 e7fa87d3-cd2b-0410-9028-fcbf551c1848