update to latest stable gdb version

target/config/Config.in.gdb.choice

@@ -1,11 +1,15 @@
 choice
 prompt "GNU debugger version"
-default ADK_TOOLCHAIN_GDB_7_8_2
+default ADK_TOOLCHAIN_GDB_7_9
 
 config ADK_TOOLCHAIN_GDB_GIT
 	bool "git"
 	depends on !ADK_TARGET_ARCH_AVR32
 
+config ADK_TOOLCHAIN_GDB_7_9
+	bool "7.9"
+	depends on !ADK_TARGET_ARCH_AVR32
+
 config ADK_TOOLCHAIN_GDB_7_8_2
 	bool "7.8.2"
 	depends on !ADK_TARGET_ARCH_AVR32

toolchain/gdb/Makefile.inc

@@ -2,6 +2,13 @@
 # material, please see the LICENCE file in the top-level directory.
 
 PKG_NAME:=		gdb
+ifeq ($(ADK_TOOLCHAIN_GDB_7_9),y)
+PKG_VERSION:=		7.9
+PKG_RELEASE:=		1
+PKG_HASH:=		9b315651a16528f7af8c7d8284699fb0c965df316cc7339bb0b7bae335848392
+PKG_SITES:=		${MASTER_SITE_GNU:=gdb/}
+DISTFILES:=		${PKG_NAME}-${PKG_VERSION}.tar.xz
+endif
 ifeq ($(ADK_TOOLCHAIN_GDB_7_8_2),y)
 PKG_VERSION:=		7.8.2
 PKG_RELEASE:=		1