crossgcc: Upgrade GDB to version 9.2

Change-Id: I30dae356ec3b373ac036c7eced7d6e89ddd08246
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38787
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/crossgcc/patches/gdb-9.2_amd64.patch

@@ -0,0 +1,14 @@
+diff -urN gdb-3.orig/gdb/configure.tgt gdb-8.3/gdb/configure.tgt
+--- gdb-8.3.orig/gdb/configure.tgt	2019-02-27 05:51:48.000000000 +0100
++++ gdb-8.3/gdb/configure.tgt	2019-05-12 08:07:45.624984535 +0200
+@@ -772,6 +772,10 @@
+ x86_64-*-rtems*)
+ 	gdb_target_obs="${amd64_tobjs} ${i386_tobjs} i386-bsd-tdep.o"
+ 	;;
++x86_64-*-*)
++	# Target: amd6
++	gdb_target_obs="amd64-tdep.o i386-tdep.o i387-tdep.o"
++	;;
+ xtensa*-*-*linux*)
+ 	# Target: GNU/Linux Xtensa
+ 	gdb_target_obs="xtensa-linux-tdep.o symfile-mem.o linux-tdep.o"