sync to KhronosGroup/glslang

Add missing braces to if condition

The indentation implies this was the intention. Noticed the issue while trying to compile our code with -Werror -Wall

GL_EXT_ray_query updates

Fix build on CMake 2.8, and fix Web build

And suppress some warnings that are too verbose in Web builds.

Make file formatting comply with POSIX and Unix standards

UTF-8, LF, no BOM, and newlines at the end of files

Fix MSVC build issue - remove invalid character

On Windows the single quote used in a comment was showing up as some
special character that the Microsoft compiler didn't like.

Bug #2140