options/linux: Define PTRACE_GETFPREGS
#define PTRACE_DETACH 17
#define PTRACE_GETFPXREGS 18
#define PTRACE_SETFPXREGS 19
+#define PTRACE_GETFPREGS 20
#define PTRACE_SYSCALL 24
#define PTRACE_SETOPTIONS 0x4200
#define PTRACE_GETEVENTMSG 0x4201
