LibPDF: Add some logging behind PDF_DEBUG

I've added these two lines a bunch of times by now. Let's check
them in. If they turn out to be annoying, we can remove them again.

Userland/Libraries/LibPDF/Parser.cpp

@@ -140,6 +140,8 @@ PDFErrorOr<Value> Parser::parse_possible_indirect_value_or_ref()
 
 PDFErrorOr<NonnullRefPtr<IndirectValue>> Parser::parse_indirect_value(u32 index, u32 generation)
 {
+    dbgln_if(PDF_DEBUG, "Parsing indirect value {} {}", index, generation);
+
     if (!m_reader.matches("obj"))
         return error("Expected \"obj\" at beginning of indirect value");
     m_reader.move_by(3);
@@ -155,6 +157,8 @@ PDFErrorOr<NonnullRefPtr<IndirectValue>> Parser::parse_indirect_value(u32 index,
 
     pop_reference();
 
+    dbgln_if(PDF_DEBUG, "Done parsing indirect value {} {}", index, generation);
+
     return make_object<IndirectValue>(index, generation, value);
 }