Update gf12/bp_single for PR #2663 (grt: Route non leaf clock nets first)

[INFO] Tightening rule placeopt__design__instance__area from 535034 to 534337.
[INFO] Tightening rule placeopt__design__instance__count__stdcell from 545791 to 544655.
[INFO] Tightening rule cts__timing__setup__ws from -1173.26 to -1156.25.
[INFO] Tightening rule cts__timing__setup__ws__pre_repair from -1292.75 to -1270.84.
[INFO] Tightening rule cts__timing__setup__ws__post_repair from -1288.55 to -1264.07.
[INFO] Tightening rule cts__design__instance__count__setup_buffer from 23736 to 23681.
[INFO] Tightening rule cts__design__instance__count__hold_buffer from 23736 to 23681.
[INFO] Tightening rule detailedroute__route__wirelength from 8702681 to 8580816.
[INFO] Updating failing rule detailedroute__route__drc_errors from 4 to 6.
[INFO] Tightening rule finish__design__instance__area from 539048 to 537578.

Signed-off-by: Matt Liberty <[email protected]>

Author: maliberty