Ivan Grokhotkov b3b8334d54 vfs and newlib: small fixes ...

- spaces->tabs in tasks.c
- update vfs_uart.c to use per-UART locks
- add license to vfs_uart.c
- allocate separate streams for stdout, stdin, stderr, so that they can be independently reassigned
- fix build system test failure

2016-10-27 17:19:39 +08:00

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