gas: dw2gencfi: externalize the all_cfi_sections

gas/
        * dw2gencfi.h: Declare all_cfi_sections as extern.
diff --git a/gas/dw2gencfi.h b/gas/dw2gencfi.h
index c73fd40..7fd6db4 100644
--- a/gas/dw2gencfi.h
+++ b/gas/dw2gencfi.h
@@ -27,6 +27,8 @@
 struct symbol;
 struct fde_entry;
 
+extern int all_cfi_sections;
+
 extern const pseudo_typeS cfi_pseudo_table[];
 
 #ifndef tc_cfi_frame_initial_instructions