SmallVectorTest: Make the deleted member functions private to help MSVC users.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210665 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SI: Use v_cvt_f32_ubyte* instructions

This eliminates extra extract instructions when loading an i8 vector to
a float vector.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210666 91177308-0d34-0410-b5e6-96231b3b80d8