Defer RPATH setting to after RootInstallDirs
Defer RPATH setting to after RootInstallDirs

Setting of CMAKE_INSTALL_RPATH prior to inclusion of RootInstallDirs
hardcodes RPATH based on CMAKE_INSTALL_PREFIX. RootInstallDirs
may result in final library install path being modified from this
value.

Move RPATH settings post-inclusion of RootInstallDirs. Set
CMAKE_INSTALL_DIR to value of CMAKE_INSTALL_FULL_LIBDIR which
is set by RootInstallDirs and will be consistent through the project.

tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot,tc3t/qoot