x86: Kernel Support for Intel SSSE3, SSE4.1, SSE4.2, and AMD SSE4A

The kernel now detects the presence of existing Intel SSSE3, SSE4.1, SSE4.2, and AMD SSE4A instruction sets. This feature enables loading and executing programs that require these hardware capabilities. dis(1) now supports disassembly of instructions from these instruction set extensions.

For a list of hardware capability requirements for a given binary, see the file(1) command. For a list of hardware capabilities supported by the loader on a given machine, see isainfo(1).