Revert "Drop FindAccountsFileDir.cmake"
ACCOUNTS_SERVICES_DIR, defined in FindAccountsFileDir, is referenced
by KAccountsMacros.cmake, and these macros will cause a configure
failure in case it is not defined.
CCMAIL: nicolas.fella@gmx.de
This reverts commit 17ff746ba128b436c0de99884f6f1efe285ceaa2.