adding rest-api to platfrom build to fix esb build

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170913 a5903396-d722-0410-b921-86c7d4935375
adding rest-api, mediation-library to platfrom build to fix esb build failures

git-svn-id: https://svn.wso2.org/repos/wso2/carbon/platform/trunk@170914 a5903396-d722-0410-b921-86c7d4935375