FreeRTOS: fix alignment back to 4

Was accidentally changed back to 8 in #544
CC: increase the init_stack_size to 200 bytes

This had to come up after the FreeRTOS 7.4 merge
PipX: increase init_stack_size to 200 bytes

This had to come up after the FreeRTOS 7.4 merge

Fixes #573
Merge pull request #574 from peabody124/freertos_fix

Fixes F1 targets after FreeRTOS 7.4 merge