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

courgette/disassembler_win32_x86.h

Index: courgette/disassembler_win32_x86.h
diff --git a/courgette/disassembler_win32_x86.h b/courgette/disassembler_win32_x86.h
index 6602f37ea957c33a6d538f0fb18d676948908570..6050c81ce9bb103a23cd0b7587fe638a9ad6e0da 100644
--- a/courgette/disassembler_win32_x86.h
+++ b/courgette/disassembler_win32_x86.h
@@ -19,6 +19,12 @@ class AssemblyProgram;
 
 class DisassemblerWin32X86 : public DisassemblerWin32 {
  public:
+  static bool QuickDetects(const void* start, size_t length) {
+    return DisassemblerWin32::QuickDetects(
+        reinterpret_cast<const uint8_t*>(start), length,
+        kImageNtOptionalHdr32Magic);
+  }
+
   DisassemblerWin32X86(const void* start, size_t length);
   ~DisassemblerWin32X86() override = default;