docs: Fix a few typos

[timgates42]

There are small typos in:

• Ports/ARM-Cortex-M/ARMv6-M/os_cpu_c.c
• Ports/ARM-Cortex-M/ARMv7-M/os_cpu_c.c
• Ports/M14K/CodeSourcery/os_cpu_c.c
• Ports/Template/os_cpu.h
• Source/os_stat.c
• TLS/CCES/os_tls.c
• TLS/IAR/os_tls.c
• TLS/NewLib/os_tls.c
• Template/bsp_os_dt.c

Fixes:

• Should read function rather than fucntion.
• Should read environments rather than enviroments.
• Should read alignment rather than aligment.
• Should read successful rather than successfu.
• Should read occurred rather than occured.
• Should read function rather than funtion.
• Should read assembly rather than assemply.
• Should read accidentally rather than accidently.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md