gpgme: Use glibc provided closefrom API when available

glibc 2.34+ has added this API new

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit a2b2479d)
Signed-off-by: Steve Sakoman <steve@sakoman.com>