package/rhash: bump version to 1.4.0

package/rhash: bump version to 1.4.0

Project switched license to BSD Zero Clause License:
https://github.com/rhash/RHash/commit/007a303dacb1ad27fb64e2133dfb8b4e28428af2

Add RHASH_CONFIGURE_CMDS after upstream added a configure script:
https://github.com/rhash/RHash/commit/cdaf43862229fb0f10d2b6b7448bcded2ef8edde

Make target install-headers was renamed to install-lib-headers:
https://github.com/rhash/RHash/commit/5184f57ed8c8a3d3ad66d789429bd8d1afc012ff

Make target install-shared was removed, use build-install-binary
instead:
https://github.com/rhash/RHash/commit/cdaf43862229fb0f10d2b6b7448bcded2ef8edde

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