glsl: fix interface block error message
glsl: fix interface block error message

Print the stream value not the pointer to the expression,
also use the unsigned format specifier.

Cc: 11.1 <59f39c0db42d4479a46b02d4d2bc11120e37bb44@lists.freedesktop.org>
Reviewed-by: Ilia Mirkin <bcbbb7aa705ec3a5fc5824c01a845186c3d62fca@alum.mit.edu>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler