FindCUDA: Search for libraries in <prefix>/lib/<arch>/nvidida-current.

Ubuntu install the CUDA libraries into a location that is different
than the default location provided by the NVidia installer. So we
teach the FindCUDA package to also find the Ubuntu install location.
SelectLibraryConfigurations: Do not cache the _LIBRARY variable

SelectLibraryConfigurations module currently cache and mark as advanced
the variable ${basename}_LIBRARY.
${basename}_LIBRARY_RELEASE and ${basename}_LIBRARY_DEBUG are usually
cached, because they often come from find_library().
${basename}_LIBRARY on the other hand is always of type
"optimized;${${basename}_LIBRARY_RELEASE};debug;${${basename}_LIBRARY_DEBUG}"
or just "${basename}_LIBRARY_RELEASE" or "${basename}_LIBRARY_DEBUG" if
only one version of the library is not found, if both have the same
value, or if configuration types are not supported.

Caching and marking as advanced just ${basename}_LIBRARY_RELEASE and
${basename}_LIBRARY_DEBUG is enough, just by modifying these two
variables, the user has enough control on finding the library, and
having 3 variables is redundant and confusing.
SelectLibraryConfigurations: Use -NOTFOUND instead of copying the vars

If one of the libraries (_DEBUG or _RELEASE) is not set, the value is
set to the value of the other one.
FindQt4, from which the macro is extracted, sets the values to
XXX_LIBRARY_{DEBUG,RELEASE}-NOTFOUND instead.
In both cases the XXX_LIBRARY is correct, but using NOTFOUND makes it
easier to understand which one is missing.
Merge topic 'FindCuda_more_search_paths' into next

0cfe4cd FindCUDA: Search for libraries in <prefix>/lib/<arch>/nvidida-current.
Use linked frameworks as a source of include directories.
Merge topic 'framework-interface-includes' into next

227a32f Use linked frameworks as a source of include directories.
Merge topic 'SelectLibraryConfigurations' into next

5cd32c2 SelectLibraryConfigurations: Use -NOTFOUND instead of copying the vars
07b44e7 SelectLibraryConfigurations: Do not cache the _LIBRARY variable