gdb: remove unspecific patch

package/gdb/patches/patch-gdb_linux-nat_c

@@ -1,26 +0,0 @@
---- gdb-7.10.1.orig/gdb/linux-nat.c	2015-12-05 16:16:45.000000000 +0100
-+++ gdb-7.10.1/gdb/linux-nat.c	2016-01-16 20:48:29.412843026 +0100
-@@ -168,6 +168,10 @@ blocked.  */
- /* Does the current host support PTRACE_GETREGSET?  */
- enum tribool have_ptrace_getregset = TRIBOOL_UNKNOWN;
- 
-+#ifndef W_STOPCODE
-+#define W_STOPCODE(sig) ((sig) << 8 | 0x7f)
-+#endif
-+
- /* The single-threaded native GNU/Linux target_ops.  We save a pointer for
-    the use of the multi-threaded target.  */
- static struct target_ops *linux_ops;
-@@ -5216,10 +5220,10 @@ lin_thread_get_thread_signals (sigset_t
-      fortunately they don't change!  */
- 
-   if (restart == 0)
--    restart = __SIGRTMIN;
-+    restart = SIGRTMIN;
- 
-   if (cancel == 0)
--    cancel = __SIGRTMIN + 1;
-+    cancel = SIGRTMIN + 1;
- 
-   sigaddset (set, restart);
-   sigaddset (set, cancel);