Change MbedTLS integration to use PropertyCopy

Pass libc specific compilation settings to MbedTLS build using
PropertyCopy. This way not only system include and include paths are
handled but compilation flags and linker flags too.
This change makes MbedTLS build use the -nostdinc flag, which is
needed for proper newlib integration and was missing.

Change-Id: I1f05232096384fd58f8693e578770c357fcb3486
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
3 files changed