tools/btmgmt: Fix compilation warning on Android
tools/btmgmt: Fix compilation warning on Android

isspace requires ctype.h include.

external/bluetooth/bluez/tools/btmgmt.c: In function 'get_input':
external/bluetooth/bluez/tools/btmgmt.c:834:2: warning: implicit
   declaration of function 'isspace' [-Wimplicit-function-declaration]
  while (len && isspace(buf[len - 1]))
  ^

silent-snowman/bluez,silent-snowman/bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez,silent-snowman/bluez,pkarasev3/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,pkarasev3/bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,mapfau/bluez,ComputeCycles/bluez