Fix erroneous errors from the dashboard.

C:\Dashboards\My Tests\CMakeNMake60-src\Source\cmTarget.cxx(3449) : error C2562: 'processCompileOptions' : 'void' function returning a value
        C:\Dashboards\My Tests\CMakeNMake60-src\Source\cmTarget.cxx(3440) : see declaration of 'processCompileOptions'
C:\Dashboards\My Tests\CMakeNMake60-src\Source\cmTarget.cxx(3557) : error C2562: 'processCompileDefinitions' : 'void' function returning a value
        C:\Dashboards\My Tests\CMakeNMake60-src\Source\cmTarget.cxx(3548) : see declaration of 'processCompileDefinitions'
Merge topic 'compile-defs-debugging' into next

80bcc79 Fix erroneous errors from the dashboard.
Add target property debugging for COMPILE_DEFINITIONS

Use constructs similar to those for COMPILE_OPTIONS. This is a little
different because there is a command to remove_definitions(), so
we can't populate the equivalent target property until generate-time
in cmGlobalGenerator.
Merge topic 'compile-defs-debugging' into next

d7dd010 Add target property debugging for COMPILE_DEFINITIONS