Previously the STM32F0518 compiler setting was changed to enable the use of the __wea...

Previously the STM32F0518 compiler setting was changed to enable the use of the __weak attribute - however changing the port layer to use #pragma weak in place of __weak means the compiler setting change is not required and removes the risk of introducing incompatibilities - so this check in reverts the compiler settings change.

git-svn-id: https://svn.code.sf.net/p/freertos/code/trunk@2784 1d2547de-c912-0410-9cb9-b8ca96c0e9e2