cmake: PROPERTY flag support on compile options and link libraries

Extend zephyr_link_libraries to allow an optional value together with
the `zephyr_link_libraries(PROPERTY <property> [<value>])`.

This allow setting linker property combined with a value when linking
Zephyr. The value will only be applied if the property is defined.

Extend zephyr_compile_options to support the same PROPERTY flag that
has been introduced for zephyr_link_libraries().
This remove the need for developers to write complex generator
expressions for compiler flags and thus minimizes mistakes.

The following syntax is now supported in addition to the existing
syntax: `zephyr_compile_options(PROPERTY <property> [<value>])`

Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>