Swift: fix autobuilder extern definition

swift/xcode-autobuilder/XcodeBuildLogging.h

@@ -2,10 +2,6 @@
 
 #include "swift/logging/SwiftLogging.h"
 
-namespace codeql {
-constexpr const std::string_view programName = "autobuilder";
-}
-
 namespace codeql_diagnostics {
 constexpr codeql::SwiftDiagnosticsSource build_command_failed{
     "build_command_failed",

swift/xcode-autobuilder/xcode-autobuilder.cpp

@@ -4,10 +4,13 @@
 #include "swift/xcode-autobuilder/XcodeTarget.h"
 #include "swift/xcode-autobuilder/XcodeBuildRunner.h"
 #include "swift/xcode-autobuilder/XcodeProjectParser.h"
+#include "swift/xcode-autobuilder/XcodeBuildLogging.h"
 
 static const char* Application = "com.apple.product-type.application";
 static const char* Framework = "com.apple.product-type.framework";
 
+const std::string_view codeql::programName = "autobuilder";
+
 struct CLIArgs {
   std::string workingDir;
   bool dryRun;