[0/6] nvptx testsuite patches

[Bernd Schmidt <bernds at codesourcery dot com>]

This series modifies a large number of tests in order to clean up 
testsuite results on nvptx. The goal here was never really to get an 
entirely clean run - the target is just too different from conventional 
ones - but to be able to test the compiler sufficiently to be sure that 
it's in good shape for use in offloading. Most of the patches here add 
annotations for use of features like alloca or indirect jumps that are 
unsupported on the target.

Examples of things that still cause failures are things like dots in 
identifiers, use of constructors (which is something I want to look 
into), certain constructs that trigger bugs in the ptxas tool, and lots 
of undefined C library functions.


Bernd