Refactor getBuiltInMacros() to be SBSv1 specific. This are the hard-coded macros misc macros we are adding for SBSv1.
For SBSv2, they are retrieved from the sbs config query. Also, clean up some API and comments on public APIS
// Copyright 2007 Nokia, Inc.
SDKUIPlugin.SDK_Preferences=Symbian SDKs
SDKUIPlugin.Platform_Filtering_Preferences=Build Configuration Filtering
#Keywords for Carbide preferences
carbcPreference.common=carbide symbian c cpp cplusplus
carbcPreference.sdkpreferences=sdk epocroot devices xml properties
carbcPreference.platformfiltering=platforms sbsv1 sbsv2 emulation winscw gcce armv5 armv5_abi2 armv5_abiv1 armi arm4 thumb bsf var