anv/formats: Don't use a compound literal to initialize a const array
anv/formats: Don't use a compound literal to initialize a const array

Doing so makes older versions of GCC rather grumpy.  Newere GCC fixes this,
but using a compound literal isn't really gaining us anything anyway.

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler