Includre rtos.h in mbed.h if present

[bogdanm]

So that apps don't need to include "rtos.h" explicitly anymore.

[bogdanm]

@mbed-bot: TEST

HOST_OSES=windows,linux
BUILD_TOOLCHAINS=GCC_ARM,ARM,IAR
TARGETS=K64F

[bogdanm]

@0xc0170 @sg-

[mbed-bot]

[Build ${MBED_BUILD_ID}]
FAILURE: Something went wrong when building and testing.

[bogdanm]

@mbed-bot: TEST

HOST_OSES=windows,linux
BUILD_TOOLCHAINS=GCC_ARM,ARM,IAR
TARGETS=K64F

[mbed-bot]

[Build 674]
FAILURE: Something went wrong when building and testing.

[bogdanm]

Not sure why mbed-bot is failing, but the failures don't seem to be related to this change.

[0xc0170]

+1

We shall not have problems with rtos/rtos.h , as it never gets flatten (opposite to what happens with mbed headers (api/hal))? Just checking to be sure

[bogdanm]

I can't predict the future :) but I think we're safe for now.

[sg-]

I'll look at testing

[bridadan]

@bogdanm Sorry about the failure with the bot (even though tests are green), it was caused due to an issue with mbed-ls. Should be resolved now.

[sg-]

@mbed-bot: TEST

HOST_OSES=windows
BUILD_TOOLCHAINS=GCC_ARM,ARM,IAR
TARGETS=K64F,NUCLEO_F411RE,NRF51_DK

[mbed-bot]

[Build 676]
SUCCESS: Building succeeded and tests were run! Be sure to check the test results