Courgette: Add static method QuickDetect() to optimize program detection.

courgette/disassembler_elf_32.h

Index: courgette/disassembler_elf_32.h
diff --git a/courgette/disassembler_elf_32.h b/courgette/disassembler_elf_32.h
index 6bcf1b888b80cd80f3529a3f3900d3f405bee630..ccc3169ec5d45ef06c485bf80baf3a1265f72646 100644
--- a/courgette/disassembler_elf_32.h
+++ b/courgette/disassembler_elf_32.h
@@ -121,6 +121,10 @@ class DisassemblerElf32 : public Disassembler {
   }
 
  protected:
+  static bool QuickDetects(const uint8_t* start,
+                           size_t length,
+                           e_machine_values elf_em);
+
   bool UpdateLength();
 
   // Misc Section Helpers