Drop the two libstdc patches as they've finally appeared upstream.
Disable the use of libstdc++.a from the host distributions, as it results
in cross-distro contamination in rust-native.
(From OE-Core rev: 94760bc118952160865352c10ca7693680b5ce7e)
Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
