sanitycheck fails for tests/bluetooth/init/bluetooth.init.test_ctlr_per_sync

[galak]

./scripts/sanitycheck -s tests/bluetooth/init/bluetooth.init.test_ctlr_per_sync -p nrf51dk_nrf51422

FAILs with:

/opt/zephyr-sdk-0.12.0-beta-1/arm-zephyr-eabi/bin/../lib/gcc/arm-zephyr-eabi/10.2.0/../../../../arm-zephyr-eabi/bin/ld: subsys/bluetooth/host/libsubsys__bluetooth__host.a(hci_core.c.obj): in function `le_past_received':
/home/galak/git/zephyr/subsys/bluetooth/host/hci_core.c:4794: undefined reference to `bt_conn_lookup_handle'
Memory region         Used Size  Region Size  %age Used
           FLASH:       71164 B       256 KB     27.15%
            SRAM:       15485 B        32 KB     47.26%
        IDT_LIST:         136 B         2 KB      6.64%
collect2: error: ld returned 1 exit status
gmake[2]: *** [zephyr/CMakeFiles/zephyr_prebuilt.dir/build.make:126: zephyr/zephyr_prebuilt.elf] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:2841: zephyr/CMakeFiles/zephyr_prebuilt.dir/all] Error 2
gmake: *** [Makefile:103: all] Error 2

[carlescufi]

@Thalley looks like we need to enable to BT_CONN or add a new conditional compilation for this.