[bluetooth] Add explicit fdio dependency to libhci

libhci code uses fdio_ioctl (via <zircon/bt-hci.h>) and so should depend
on fdio directly.  Missing the explicit dependency works today because
the libraries exported from Zircon have excessive dependencies that do
not reflect the proper modularity.  This will be tightened up soon.

Bug: BLD-325
Test: CQ
Change-Id: I2a58bcbb2f13af44ceefa20d32789be7fc01d13f
1 file changed