Added a linker

src/elf/SectionHeader.go

@@ -0,0 +1,18 @@
+package elf
+
+// SectionHeaderSize is equal to the size of a section header in bytes.
+const SectionHeaderSize = 64
+
+// SectionHeader points to the data sections of our program.
+type SectionHeader struct {
+	NameIndex      int32
+	Type           SectionType
+	Flags          SectionFlags
+	VirtualAddress int64
+	Offset         int64
+	SizeInFile     int64
+	Link           int32
+	Info           int32
+	Align          int64
+	EntrySize      int64
+}