glsl: Check earlier for MaxShaderStorageBlocks and MaxUniformBlocks

glsl: Check earlier for MaxShaderStorageBlocks and MaxUniformBlocks

Currently the linker do all the work then check for the limits, which
means num_ssbos and num_ubos in shader_info may have to store more
than the limit.  This breaks down now since shader_info was packed and
doesn't expect to store larger invalid values.

To fix this, pull the check before we set the counts in shader_info.
One drawback of this approach is that for some cases we might not see
the collected errors from various stages, but bail as soon as a stage
breaks the limits.

Fixes: 84a1a2578da ("compiler: pack shader_info from 160 bytes to 96 bytes")
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>