pull in package for libaccounts-glib.pc

this is now being looked for in the cmake config

18:00:54 -- Found PkgConfig: /usr/bin/pkg-config (found version
"0.29.1")
18:00:54 Package libaccounts-glib was not found in the pkg-config search
path.
18:00:54 Perhaps you should add the directory containing
`libaccounts-glib.pc'
18:00:54 to the PKG_CONFIG_PATH environment variable
18:00:54 No package 'libaccounts-glib' found
18:00:54 CMake Error at
/usr/lib/x86_64-linux-gnu/cmake/KAccounts/FindAccountsFileDir.cmake:11
(message):
18:00:54   Couldn't find the prefix for libaccounts-glib