The source project of this merge request has been removed.
Test complex<T> for floating point T only
The standard leaves (the effect of instantiating) complex for more general T unspecified.
While we're at it, kill duplicate tests and add long double to the list.
This fixes bug flyspray/FS#1726 (closed): Now also with clang 3.7 and libstdc++ 4.9.2 on Debian 8.2, the test fvectortest can be compiled again.