gdb: update to 10.2

Replace some OpenWrt patches with openembedded ones for easier
maintainability. Remove several outdated ones as well.

Replace PKG_RELEASE with AUTORELEASE to avoid manual bumps.

Remove !arc dependency as it is supported upstream now.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/devel/gdb/patches/130-gdb-ctrl-c.patch

@@ -0,0 +1,35 @@
+From 63df98fa78c8a6e12b40ebdc5c155838d2bf8b5f Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 29 Nov 2018 18:00:23 -0800
+Subject: [PATCH 11/11] gdbserver ctrl-c handling
+
+This problem was created by the upstream commit 78708b7c8c
+After applying the commit, it will send SIGINT to the process
+group(-signal_pid).
+But if we use gdbserver send SIGINT, and the attached process is not a
+process
+group leader, then the "kill (-signal_pid, SIGINT)" returns error and
+fails  to
+interrupt the attached process.
+
+Upstream-Status: Submitted
+[https://sourceware.org/bugzilla/show_bug.cgi?id=18945]
+
+Author: Josh Gao
+Signed-off-by: Zhixiong Chi <zhixiong.chi@windriver.com>
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ gdbserver/linux-low.cc | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/gdbserver/linux-low.cc
++++ b/gdbserver/linux-low.cc
+@@ -5714,7 +5714,7 @@ linux_process_target::request_interrupt
+ {
+   /* Send a SIGINT to the process group.  This acts just like the user
+      typed a ^C on the controlling terminal.  */
+-  ::kill (-signal_pid, SIGINT);
++  ::kill (signal_pid, SIGINT);
+ }
+ 
+ bool