Added assembler merging

src/asm/Assembler.go

@@ -62,6 +62,11 @@ func (a *Assembler) Finalize(verbose bool) ([]byte, []byte) {
 	return code, data
 }
 
+// Merge combines the contents of this assembler with another one.
+func (a *Assembler) Merge(b *Assembler) {
+	a.Instructions = append(a.Instructions, b.Instructions...)
+}
+
 // MoveRegisterData moves a data section address into the given register.
 func (a *Assembler) MoveRegisterData(reg register.ID, data []byte) {
 	a.Instructions = append(a.Instructions, Instruction{