LibDebug: Make LineProgram::create take DwarfInfo as a const reference

The m_dwarf_info is never mutated, so it can be const.

Userland/Libraries/LibDebug/Dwarf/LineProgram.cpp

@@ -13,13 +13,13 @@
 
 namespace Debug::Dwarf {
 
-LineProgram::LineProgram(DwarfInfo& dwarf_info, size_t unit_offset)
+LineProgram::LineProgram(DwarfInfo const& dwarf_info, size_t unit_offset)
     : m_dwarf_info(dwarf_info)
     , m_unit_offset(unit_offset)
 {
 }
 
-ErrorOr<NonnullOwnPtr<LineProgram>> LineProgram::create(DwarfInfo& dwarf_info, SeekableStream& stream)
+ErrorOr<NonnullOwnPtr<LineProgram>> LineProgram::create(DwarfInfo const& dwarf_info, SeekableStream& stream)
 {
     auto offset = TRY(stream.tell());
     auto program = TRY(adopt_nonnull_own_or_enomem(new (nothrow) LineProgram(dwarf_info, offset)));

Userland/Libraries/LibDebug/Dwarf/LineProgram.h

@@ -109,7 +109,7 @@ class LineProgram {
     AK_MAKE_NONMOVABLE(LineProgram);
 
 public:
-    static ErrorOr<NonnullOwnPtr<LineProgram>> create(DwarfInfo& dwarf_info, SeekableStream& stream);
+    static ErrorOr<NonnullOwnPtr<LineProgram>> create(DwarfInfo const& dwarf_info, SeekableStream& stream);
 
     struct LineInfo {
         FlatPtr address { 0 };
@@ -134,7 +134,7 @@ public:
     bool looks_like_embedded_resource() const;
 
 private:
-    LineProgram(DwarfInfo& dwarf_info, size_t unit_offset);
+    LineProgram(DwarfInfo const& dwarf_info, size_t unit_offset);
 
     ErrorOr<void> parse_unit_header(SeekableStream& stream);
     ErrorOr<void> parse_source_directories(SeekableStream& stream);
@@ -175,7 +175,7 @@ private:
     static constexpr u16 MIN_DWARF_VERSION = 3;
     static constexpr u16 MAX_DWARF_VERSION = 5;
 
-    DwarfInfo& m_dwarf_info;
+    DwarfInfo const& m_dwarf_info;
 
     size_t m_unit_offset { 0 };
     LineProgramUnitHeader32 m_unit_header {};