Include the precompiled header file.

conanfile.py

@@ -34,6 +34,7 @@ class ArbutilsConan(ConanFile):
 
     def package(self):
         self.copy("*.hpp", dst="include/Arbutils", src="src")
+        self.copy("*.hxx", dst="include/Arbutils", src="src")
         self.copy("*.hpp", dst="include/extern", src="extern")
         self.copy("*.dll", dst="bin", keep_path=False)
         self.copy("*.so", dst="lib", keep_path=False)