Bootmgr (macOS): add support

src/detection/bootmgr/bootmgr_apple.c

@@ -0,0 +1,12 @@
+#include "bootmgr.h"
+#include "common/io/io.h"
+
+const char* ffDetectBootmgr(FFBootmgrResult* result)
+{
+    if (ffPathExists("/System/Library/CoreServices/boot.efi", FF_PATHTYPE_FILE))
+        ffStrbufSetStatic(&result->firmware, "/System/Library/CoreServices/boot.efi");
+
+    ffStrbufSetStatic(&result->name, "iBoot");
+
+    return NULL;
+}