[RTOS] Add Nucleo STM32L152RE platform

[toyowata]

• Add RTOS support for Nucleo STM32L152RE
• Add RTOS tests for the target
• Add RTOS build for build travis

[toyowata]

[Automated test result]

Test summary:
+---------+---------------+-----------+-------------+---------------------------------------+--------------------+---------------+-------+
| Result  | Target        | Toolchain | Test ID     | Test Description                      | Elapsed Time (sec) | Timeout (sec) | Loops |
+---------+---------------+-----------+-------------+---------------------------------------+--------------------+---------------+-------+
| OK      | NUCLEO_L152RE | ARM       | DTCT_1      | Simple detect test                    |        1.5         |       10      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | EXAMPLE_1   | /dev/null                             |        4.41        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_10     | Hello World                           |        1.34        |       5       |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_11     | Ticker Int                            |        13.0        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_12     | C++                                   |        2.37        |       10      |  1/1  |
| FAIL    | NUCLEO_L152RE | ARM       | MBED_16     | RTC                                   |       11.33        |       20      |  0/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_2      | stdio                                 |        1.75        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_23     | Ticker Int us                         |       12.06        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_24     | Timeout Int us                        |       12.02        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_25     | Time us                               |       12.54        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_26     | Integer constant division             |        2.37        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_34     | Ticker Two callbacks                  |       12.56        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_A1     | Basic                                 |        2.35        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_A21    | Call function before main (mbed_main) |        2.43        |       20      |  1/1  |
| TIMEOUT | NUCLEO_L152RE | ARM       | MBED_A9     | Serial Echo at 115200                 |       40.08        |       20      |  0/1  |
| OK      | NUCLEO_L152RE | ARM       | MBED_BUSOUT | BusOut                                |        3.27        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_1      | Basic thread                          |       13.02        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_2      | Mutex resource lock                   |       12.34        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_3      | Semaphore resource lock               |        9.36        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_4      | Signals messaging                     |        7.38        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_5      | Queue messaging                       |        3.36        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_6      | Mail messaging                        |        3.36        |       20      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_7      | Timer                                 |        13.0        |       15      |  1/1  |
| OK      | NUCLEO_L152RE | ARM       | RTOS_8      | ISR (Queue)                           |        7.37        |       20      |  1/1  |
+---------+---------------+-----------+-------------+---------------------------------------+--------------------+---------------+-------+
Result: 1 FAIL / 22 OK / 1 TIMEOUT

Completed in 292.25 sec

Build successes:
  * ARM::NUCLEO_L152RE

RTC (MBED_16) and Serial Echo at 115200 (MBED_A9) failed, but they also failed by other platforms such as NXP LPC1768. Maybe, problem in common host test script?

[0xc0170]

Thanks for sharing the test output. I noticed similar problem with the test, we need to look at it.