The linker matches up variables in interface blocks according to their
block name and variable name.  When support for interface block arrays
was added in commit d6863acb

, we renamed variables appearing in
interface blocks so that their name included the array size.  For
example, in a block like this:

out foo {
   float bar
} baz[3];

The variable "bar" would get renamed to "bar[3]".

This is unnecessary, and leads to problems in supporting geometry
shaders, since geometry shaders require vertex shader outputs which
are non-arrays to be linked up to geometry shader inputs which are
arrays.

This patch makes the behaviour of interface block arrays the same as
simple non-array interface blocks; in both cases, the variables
contained within them are not renamed.

Reviewed-by: Matt Turner <mattst88@gmail.com>