jimtcl: update config.guess / config.sub

Fixes:
http://autobuild.buildroot.net/results/284/284876bd649cab26e5ecd696c03c71c077ea7411/

The build system doesn't use autotools, but does use an old version of
gnuconfig which doesn't know all the architectures supported by Buildroot,
so update config.guess / config.sub like we do in pkg-autotools.mk

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/jimtcl/jimtcl.mk

@@ -38,6 +38,12 @@ define JIMTCL_INSTALL_LIB
 endef
 endif
 
+# build system doesn't use autotools, but does use an old version of
+# gnuconfig which doesn't know all the architectures supported by
+# Buildroot, so update config.guess / config.sub like we do in
+# pkg-autotools.mk
+JIMTCL_POST_PATCH_HOOKS += UPDATE_CONFIG_HOOK
+
 define JIMTCL_CONFIGURE_CMDS
 	(cd $(@D); \
 		$(TARGET_CONFIGURE_OPTS) CCACHE=none \