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

courgette/disassembler_elf_32_arm.h

Index: courgette/disassembler_elf_32_arm.h
diff --git a/courgette/disassembler_elf_32_arm.h b/courgette/disassembler_elf_32_arm.h
index 83f5dc6a237b8dc6cdd098ca3906c750227684c5..ff32b8f7022257291989b766dd3137ea81684cf7 100644
--- a/courgette/disassembler_elf_32_arm.h
+++ b/courgette/disassembler_elf_32_arm.h
@@ -28,6 +28,11 @@ enum ARM_RVA {
 
 class DisassemblerElf32ARM : public DisassemblerElf32 {
  public:
+  static bool QuickDetects(const void* start, size_t length) {
+    return DisassemblerElf32::QuickDetects(
+        reinterpret_cast<const uint8_t*>(start), length, EM_ARM);
+  }
+
   class TypedRVAARM : public TypedRVA {
    public:
     TypedRVAARM(ARM_RVA type, RVA rva) : TypedRVA(rva), type_(type) { }