package/pinentry: bump version to 1.0.0

package/pinentry: bump version to 1.0.0

Removed patch applied upstream:
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=pinentry.git;a=commitdiff;h=f0db3192463cccf4541820de36d985629c4df6ee

Added sha256 hash.

Added dependencies to libassuan & libgpg-error needed after
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=pinentry.git;a=commit;h=302903f76b8d62b1e07219a203f7219cb3aff7d8

Removed CXXFLAGS added for gcc >= 5.x as noted by Thomas:
https://git.buildroot.net/buildroot/commit/package/pinentry?id=9694305ae0b2a7dbdcc74e2c646d392ceed9876f

Renamed configure option -pinentry-qt4 to -pinentry-qt after
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=pinentry.git;a=commit;h=abb59f50abf698ff1e56490fb39bcc98c26ab44b
Qt5 support, also added by this upstream commit, will be added to this
package with a subsequent commit.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>