- Fix some logic errors in top level cmakelists related to building greentea tests
- Fix mbed_create_distro() for OBJECT libraries

mbed-cli1 does not pass -I to IAR for iarasm (comparing to other toolchains). Because old tools are frozen,
we implement this workaround for fixing the build.

We use preprocessor macros that are passed to .S files anyway, so we do not loose anything but we do diverge again from CMSIS, for now..

For FPU, use armasm to select fpu selection. This will be fixed upstream in the next version of CMSIS. Meanwhile, we use our local patch.

Taken from --cpu selection for armasm:

--cpu           | {FPU}
Cortex-M4.fp.sp | VFPv4_SP_D16
Cortex-M7.fp.sp | FPv5-SP
Cortex-M7.fp.dp | FPv5_D16

Tracking issue: https://github.com/ARM-software/CMSIS_5/issues/1266

We use preprocessor for asm files even for Armcc. If symbol is defined it's replaced by preprocessor,
asembler would just see 1 or 0 in this case and errors:
TARGET_M33\\irq_armv8mml.S", line 31: Error: A1185E: Symbol missing

Use preprocessor instead.

rtx_def includes two CMSIS headers that pull in C/C++ headers in our case. As I found out,
they should only define macros. We can fix it but it will require some refactoring as our targets
use mbed rtx headers to define heap using stdin header, plus some other offenders.

Workaround is to exclude the headers we do not need in irq assembly files.

Tracking issue https://github.com/ARMmbed/mbed-os/issues/14962

Upstream fix was merged https://github.com/ARM-software/CMSIS_5/pull/1238. Included here as it will be overwritten once again updated

(cherry picked from commit 08ab8cc)

mbed OS used older RTX4 version and with osThreadDef accepting only 3
parameters, to preserve compatibility we hardcode the 'instances'
parameter to 1.

(cherry picked from commit 428acae)
(cherry picked from commit 4360b7b)

CMSIS provides both GNU and legacy ARM assembly files. Instead of using
armasm and legacy asm with ARM Compiler 6, CMakeLists is modified to
use the GNU format with both GCC_ARM and ARM C6.

- Add a new MbedOS project in mbed os root CMake which can be used along with
  BUILD_TESTING conditional check for enabling the unittest build
- Update UNITTEST CMake for setting the CMake configuration like c, cxx flags etc.,
- Add if CMAKE_CROSSCOMPILING conditional check wherever target configuration check
  and toolchain configuration to avoid such configuration gets included for unittest build.

mbed-os consists of mbed-core and mbed-rtos
mbed-baremetal consists of mbed-core

The main change is for mbed-core. Changing from object library to be interface. This way it allows us to do the above to have 2 main targets for users to use.

This should be backward compatible change as mbed-os target we used contains the same files/options as previously set.

Add or remove and directories containing source files, header files, and macro definitions that implement RTOS support.
This includes:
- cmsis/CMSIS_5/CMSIS/RTOS2/
- cmsis/device/rtos/
- rtos/source/ConditionVariable.cpp
- rtos/source/Thread.cpp

* mbed-os renamed mbed-core
* mbed-os-<COMPONENT> renamed mbed-<COMPONENT>

See docs/adr/0001_cmsis_component_source_structure_recommendations.md
For details information.