gdb: Update to version 15.2

See news file for changes:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=blob_plain;f=gdb/NEWS;hb=gdb-15.1-release

Link: https://github.com/openwrt/openwrt/pull/16665
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

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

@@ -24,7 +24,7 @@ Signed-off-by: Khem Raj <raj.khem@gmail.com>
 
 --- a/gdbserver/linux-low.cc
 +++ b/gdbserver/linux-low.cc
-@@ -5481,7 +5481,7 @@ linux_process_target::request_interrupt
+@@ -5525,7 +5525,7 @@ 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.  */