Corrected several component aliasing tests which shouldn't be failing
or were failing due to a different reason than the tested one:
interpolation qualifiers mismatch.

From Section 4.4.1 (Input Layout Qualifiers) of the GLSL 4.50 spec:

  " Further, when location aliasing, the aliases sharing the location
    must have the same underlying numerical type (floating-point or
    integer) and the same auxiliary storage and interpolation
    qualification."

Cc: Timothy Arceri <tarceri@itsqueeze.com>
Signed-off-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>