[patch] Profiling for IIR, FIR and matrix-vector functions

[Don McCoy]

This patch also reorganizes some of the description and operation 
counting functions to one place and puts them under a namespace matching 
their section name from the specification.  For example, 'dot', 'outer' 
and other matrix-vector helper functions are under the 'impl::matvec' 
namespace.  Signal processing helper functions, including the 
Convolution and Correlation functions, are now under 'impl::signal' 
namespace.

This reorganization is helpful because it keeps all of these related 
functions in one place, which should be easier for maintenance.  Note, 
FFT helper functions and some of the operations counting functions have 
not yet been moved either, pending approval of the current changes.

Two miscellaneous fixes are included:  A change to the benchmarks 
makefile skips building MPI benchmarks when not configured with MPI. 
Second, a benchmark missed getting updated due to the change in location 
of the ops_info.hpp header file.

Regards,

-- 
Don McCoy
don (at) CodeSourcery
(888) 776-0262 / (650) 331-3385, x712
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