Changelog:
==========
Fixed a bug where the content type header was not properly encoded for PKCS7
signatures when using the Text option and SMIME encoding.
(From OE-Core rev: 1fb6b8839fa7fd38595b6f3218a9b096c246b00b)
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
