fix x86_64 build with musl, from sabotage

package/gdb/patches/patch-gdb_amd64-linux-nat_c

@@ -1,6 +1,6 @@
 --- gdb-7.6.orig/gdb/amd64-linux-nat.c	2013-03-11 09:25:57.000000000 +0100
-+++ gdb-7.6/gdb/amd64-linux-nat.c	2013-09-04 13:29:05.000000000 +0200
-@@ -25,8 +25,6 @@
++++ gdb-7.6/gdb/amd64-linux-nat.c	2013-10-26 22:30:11.000000000 +0200
+@@ -25,15 +25,13 @@
  #include "regset.h"
  #include "linux-nat.h"
  #include "amd64-linux-tdep.h"
@@ -9,6 +9,14 @@
  
  #include "gdb_assert.h"
  #include "gdb_string.h"
+ #include "elf/common.h"
+ #include <sys/uio.h>
+ #include <sys/ptrace.h>
+-#include <sys/debugreg.h>
++#include "debugreg.h"
+ #include <sys/syscall.h>
+ #include <sys/procfs.h>
+ #include <sys/user.h>
 @@ -1121,47 +1119,6 @@ amd64_linux_read_description (struct tar
      }
  }

package/gdb/src/gdb/debugreg.h

@@ -0,0 +1,48 @@
+#ifndef SYS_DEBUGREG_H
+#define SYS_DEBUGREG_H
+
+#include <stdint.h>
+
+#define DR_FIRSTADDR 0
+#define DR_LASTADDR 3
+
+#define DR_STATUS 6
+#define DR_CONTROL 7
+
+#define DR_TRAP0        (0x1)
+#define DR_TRAP1        (0x2)
+#define DR_TRAP2        (0x4)
+#define DR_TRAP3        (0x8)
+
+#define DR_STEP         (0x4000)
+#define DR_SWITCH       (0x8000)
+
+#define DR_CONTROL_SHIFT 16
+#define DR_CONTROL_SIZE  4
+
+#define DR_RW_EXECUTE   (0x0)
+#define DR_RW_WRITE     (0x1)
+#define DR_RW_READ      (0x3)
+
+#define DR_LEN_1 (0x0)
+#define DR_LEN_2 (0x4)
+#define DR_LEN_4 (0xC)
+#define DR_LEN_8 (0x8)
+
+#define DR_LOCAL_ENABLE_SHIFT  0
+#define DR_GLOBAL_ENABLE_SHIFT 1
+#define DR_ENABLE_SIZE         2
+
+#define DR_LOCAL_ENABLE_MASK  (0x55)
+#define DR_GLOBAL_ENABLE_MASK (0xAA)
+
+
+#if SIZE_MAX > 4294967295
+# define DR_CONTROL_RESERVED (0xFFFFFFFF0000FC00UL)
+#else
+# define DR_CONTROL_RESERVED (0x00FC00U)
+#endif
+#define DR_LOCAL_SLOWDOWN   (0x100)
+#define DR_GLOBAL_SLOWDOWN  (0x200)
+
+#endif