[gn build] Port 745e8bf

Author: llvmgnsyncbot

llvm/utils/gn/secondary/lldb/source/Symbol/BUILD.gn

@@ -26,14 +26,14 @@ static_library("Symbol") {
     "Function.cpp",
     "LineEntry.cpp",
     "LineTable.cpp",
-    "LocateSymbolFile.cpp",
     "ObjectContainer.cpp",
     "ObjectFile.cpp",
     "PostfixExpression.cpp",
     "Symbol.cpp",
     "SymbolContext.cpp",
     "SymbolFile.cpp",
     "SymbolFileOnDemand.cpp",
+    "SymbolLocator.cpp",
     "SymbolVendor.cpp",
     "Symtab.cpp",
     "Type.cpp",