builder.py: Add case for plain text files.

Update #4082

builder.py

@@ -202,6 +202,9 @@ def revertFixLocalIncludes(data):
     data = re.sub('#include <rtems/bsd/local/([^>]*)>', '#include "\\1"', data)
     return data
 
+def assertNothing(path):
+    pass
+
 def assertHeaderFile(path):
     if path[-2] != '.' or path[-1] != 'h':
         print("*** " + path + " does not end in .h")
@@ -690,6 +693,11 @@ class Module(object):
                            reverseConverter, buildSystemComposer)]
         return files
 
+    def addPlainTextFile(self, files):
+        self.files += self.addFiles(files,
+                                    FreeBSDPathComposer(), Converter(),
+                                    Converter(), assertNothing)
+
     def addKernelSpaceHeaderFiles(self, files):
         self.files += self.addFiles(files,
                                     FreeBSDPathComposer(), FromFreeBSDToRTEMSHeaderConverter(),