Bluetooth: samples: Fix minimal configuration stack sizes

With recent changes to the host stack and crypto subsystem, the actual
usage of the system and long workqueues has changed.

Here's the measured usage when doing LE SC pairing on a Cortex M0 target:

BT LW WQ            : STACK: unused 360 usage 1040 / 1400 (74 %); CPU: 4 %
sysworkq            : STACK: unused 0 usage 1024 / 1024 (100 %); CPU: 0 %

Signed-off-by: Johan Hedberg <johan.hedberg@silabs.com>

Author: jhedberg

samples/bluetooth/central_hr/prj_minimal.conf

@@ -65,7 +65,8 @@ CONFIG_ARM_MPU=n
 CONFIG_BT_RX_STACK_SIZE=1024
 CONFIG_BT_HCI_TX_STACK_SIZE_WITH_PROMPT=y
 CONFIG_BT_HCI_TX_STACK_SIZE=640
-CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1100
+CONFIG_BT_LONG_WQ_STACK_SIZE=1100
 CONFIG_IDLE_STACK_SIZE=128
 CONFIG_MAIN_STACK_SIZE=640
 CONFIG_ISR_STACK_SIZE=1024

samples/bluetooth/peripheral_hr/prj_minimal.conf

@@ -71,7 +71,8 @@ CONFIG_ARM_MPU=n
 CONFIG_BT_RX_STACK_SIZE=1024
 CONFIG_BT_HCI_TX_STACK_SIZE_WITH_PROMPT=y
 CONFIG_BT_HCI_TX_STACK_SIZE=640
-CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=512
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=1100
+CONFIG_BT_LONG_WQ_STACK_SIZE=1100
 CONFIG_IDLE_STACK_SIZE=128
 CONFIG_MAIN_STACK_SIZE=640
 CONFIG_ISR_STACK_SIZE=1024