Register SwiftCompilerSources modules in libSwiftScan

Author: artemcm

tools/libSwiftScan/libSwiftScan.cpp

@@ -21,6 +21,7 @@
 #include "swift/DependencyScan/StringUtils.h"
 #include "swift/DriverTool/DriverTool.h"
 #include "swift/Option/Options.h"
+#include "swift/SIL/SILBridging.h"
 
 using namespace swift::dependencies;
 
@@ -131,7 +132,8 @@ void swiftscan_scanner_cache_reset(swiftscan_scanner_t scanner) {
 
 swiftscan_scanner_t swiftscan_scanner_create(void) {
   INITIALIZE_LLVM();
-  initializeSwiftModules();
+  if (!swiftModulesInitialized())
+    initializeSwiftModules();
   return wrap(new DependencyScanningTool());
 }