Interception library for forwarding mode not built correctly

The required compile definitions (i.e. GKFS_ENABLE_FORWARDING and GKFS_ENABLE_AGIOS) for the gkfwd_intercept target are not being set correctly. Instead, they are being set twice in the gkfwd_daemon target:

if(GKFS_ENABLE_FORWARDING)
  add_library(gkfwd_intercept SHARED)
  target_compile_definitions(gkfwd_daemon PUBLIC GKFS_ENABLE_FORWARDING)