insane, license: Trap MalformedUrl exceptions when parsing LIC_FILES_CHKSUM

bb.fetch.decodeurl() will throw if it doesn't like the look of the URL that
it's given.  (Bitbake's idea of what constitutes a valid URL is somewhat
idiosyncratic so it is fairly easy to trip over this by mistake when writing
a recipe.)

If these exceptions are allowed to propagate all the way up to better_exec()
then we will get a large amount of python stack trace spew when they are
finally caught.  Avoid that by catching them locally and throwing
bb.build.FuncFailed() with a suitable explanation instead.

Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
binutils: Add gnu-config-native to DEPENDS

do_configure() in binutils.inc includes an explicit call to
gnu-configize so we need to make sure that gnu-config-native is
present.  Previously this was being dragged in with the rest of the
autotools stuff, but commit 54a3e2ee37003fc56af0339f857b0b6442790c26
disabled that for binutils-cross on the grounds that "we don't
autoreconf" the toolchain components.  Fix this by adding
gnu-config-native itself explicitly to DEPENDS.

Signed-off-by: Phil Blundell <philb@gnu.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>