Update piglit reference to match the latest master.
Store the sorted version.
Updated piglit reference file to the latest commit in piglit.
Made the sorting of the reference more stable by fixing the
locale used.
Some the AMD tests fail to build in case having a 'wrong' version of GL (happens in Ubuntu 14.04). Build the ones that can be built by using -k switch to the make.
XFAIL the vector kernel args test also if _DEBUG is set.
Remove references to the old WIVectorizer as it's deprecated and
probably breaks with LLVM 3.5.
Use size_t to avoid ambiguous Buffer ctor error with Clang 3.4.
Skip AMD 2.9's NBody, Mandelbrot, and BinomialOptionMultiGPU if
they were not built (due to incompatible GL, for example).
LLVM 3.4: compiling blocks crashes Clang with multiple address
spaces. The patch fixes this. Will be submitting upstream.