add small GetSymbolContext comment

Author: eronnen

lldb/include/lldb/API/SBAddress.h

@@ -59,6 +59,9 @@ class LLDB_API SBAddress {
   // "lldb::SBAddress SBTarget::ResolveLoadAddress (...)".
   lldb::SBSymbolContext GetSymbolContext(uint32_t resolve_scope);
 
+  /// Same as the previous function, but uses the given target in the symbol
+  /// context. This can help to resolve things that require the target,
+  // for example it's necessary in order to apply source map on SBLineEntry.
   lldb::SBSymbolContext GetSymbolContext(const SBTarget &target,
                                          uint32_t resolve_scope);