vk: Fix GLSL_VK_SHADER macro
vk: Fix GLSL_VK_SHADER macro

Stringify doesn't work with __ARGV__. The last macro argument swallows
up excess arguments and as such we can just stringify that.

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler