This adds some extra instrumentation to bessel_j0.hpp, everything else are fixes for the test programs.
The advantage of testing on this platform is that it has a true 128-bit long double which is a good test of our assumptions in code.
Fix array declarations so GCC doesn't warn about them.
Declare constants in headers so they can be used by UDT's larger than type long double.
Suppress a few warnings and fix a couple of bugs that showed up when testing with UDT's.
[SVN r75960]