Front-end Arrays of arrays: Add ES-specific checks and tests.  AoA should be quite close to done now.

glslang parser: Arrays-of-arrays name-mangling and error messages (lots of A-of-A stuff to come a bit later).  This patch from Google, David Neto <dneto@google.com>.


git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@31137 e7fa87d3-cd2b-0410-9028-fcbf551c1848