Modify linker scripts to add heap to memory map, add list of supported c libs and "bare-metal" to supported_application_profiles.

The armclang shebang is required in the scatter file in order to build with CMake.

Workaround a bug where the boot stack size configuration option is not
passed on to armlink, the Arm Compiler's linker. Prefer
MBED_CONF_TARGET_BOOT_STACK_SIZE if present, as this is what the
configuration system should provide. Fall back to MBED_BOOT_STACK_SIZE
if MBED_CONF_TARGET_BOOT_STACK_SIZE is not defined, as in the case of
buggy tools. If both MBED_CONF_TARGET_BOOT_STACK_SIZE and
MBED_BOOT_STACK_SIZE are not defined, then we fall back to a hard-coded
value provided by the linkerscript. See
https://github.com/ARMmbed/mbed-os/issues/13474 for more information.

To allow overriding of the boot stack size from the Mbed configuration
system, consistently use MBED_CONF_TARGET_BOOT_STACK_SIZE rather than
MBED_BOOT_STACK_SIZE.

Fixes #10319

This is a fix for Issue#9254

Signed-off-by: Mahesh Mahadevan <mahesh.mahadevan@nxp.com>

remove duplicate sys.cpp

Signed-off-by: Mahadevan Mahesh <Mahesh.Mahadevan@nxp.com>