Add user-space ptrace data structure to dump VFP registers and status word.

libc/kernel/arch-arm/asm/ptrace.h

@@ -29,6 +29,8 @@
 #define PTRACE_GETCRUNCHREGS 25
 #define PTRACE_SETCRUNCHREGS 26
 
+#define PTRACE_GETVFPREGS 27
+
 #define USR26_MODE 0x00000000
 #define FIQ26_MODE 0x00000001
 #define IRQ26_MODE 0x00000002
@@ -64,6 +66,11 @@ struct pt_regs {
   long uregs[18];
 };
 
+struct user_vfp {
+  unsigned long long fpregs[32];
+  unsigned long fpscr;
+};
+
 #define ARM_cpsr uregs[16]
 #define ARM_pc uregs[15]
 #define ARM_lr uregs[14]