[Dependency Scanning] Build libSwiftScan with Swift Modules required for parsing regex

Otherwise scanning actions which encounter regex literals will fail.

Resolve rdar://108321860

Author: artemcm

lib/DependencyScan/CMakeLists.txt

@@ -11,4 +11,5 @@ target_link_libraries(swiftDependencyScan INTERFACE
 
 target_link_libraries(swiftDependencyScan PRIVATE
     swiftClangImporter
-    swiftFrontend)
+    swiftFrontend
+    swiftCompilerModules)

tools/libSwiftScan/CMakeLists.txt

@@ -22,8 +22,7 @@ target_link_libraries(libSwiftScan PRIVATE
     swiftDependencyScan
     swiftDriverTool
     swiftStaticMirror
-    swiftRemoteInspection
-    swiftCompilerStub)
+    swiftRemoteInspection)
 
 set_target_properties(libSwiftScan
     PROPERTIES

tools/libSwiftScan/libSwiftScan.cpp

@@ -15,6 +15,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "swift/Basic/LLVMInitialize.h"
+#include "swift/Basic/InitializeSwiftModules.h"
 #include "swift/DriverTool/DriverTool.h"
 #include "swift/DependencyScan/DependencyScanImpl.h"
 #include "swift/DependencyScan/DependencyScanningTool.h"
@@ -114,6 +115,9 @@ void swiftscan_scanner_cache_reset(swiftscan_scanner_t scanner) {
 
 swiftscan_scanner_t swiftscan_scanner_create(void) {
   INITIALIZE_LLVM();
+  // We must initialize the swift modules responsible for parsing functionality,
+  // such as parsing regex.
+  initializeSwiftParseModules();
   return wrap(new DependencyScanningTool());
 }