extend ffi_prepare_args for FFI_VFP (hard-float ABI), fixing an issue with passing VFP arguments in VFP registers and the stack, while at the same time not using all core registers.
extend ffi_prepare_args for FFI_VFP (hard-float ABI), fixing an issue with passing VFP arguments in VFP registers and the stack, while at the same time not using all core registers.

davibe/libffi,s1341/libffi,davibe/libffi,johne53/MB3Libffi,Distrotech/libffi,Pan7/libffi,bgarrels/libffi,joshtriplett/libffi,zwaldowski/libffi-iOS,biosbits/libffi,zwaldowski/libffi-iOS,s1341/libffi,bgarrels/libffi,nmav/libffi,plicease/libffi,Pan7/libffi,nmav/libffi,Distrotech/libffi,s1341/libffi,plicease/libffi,Distrotech/libffi,davibe/libffi,rth7680/libffi,joshtriplett/libffi,davibe/libffi,bgarrels/libffi,s1341/libffi,rth7680/libffi,rth7680/libffi,johne53/MB3Libffi,biosbits/libffi,joshtriplett/libffi,bgarrels/libffi,johne53/MB3Libffi,joshtriplett/libffi,plicease/libffi,johne53/MB3Libffi,zwaldowski/libffi-iOS,plicease/libffi,biosbits/libffi,nmav/libffi,nmav/libffi,zwaldowski/libffi-iOS,biosbits/libffi,Distrotech/libffi,Pan7/libffi,johne53/MB3Libffi,rth7680/libffi,Pan7/libffi,zwaldowski/libffi-iOS