[master] 1af227233 build: Disable -Wincomplete-setjmp-declaration

[Dridi Boukelmoune]

commit 1af2272331216a51e2e4b83e08378e2e3c0caecd
Author: Dridi Boukelmoune <dridi.boukelmoune at gmail.com>
Date:   Tue Mar 30 13:45:13 2021 +0200

    build: Disable -Wincomplete-setjmp-declaration

diff --git a/wflags.py b/wflags.py
index bd9d27e5f..d7b0e6060 100644
--- a/wflags.py
+++ b/wflags.py
@@ -74,6 +74,7 @@ UNDESIRABLE_WFLAGS = [
     "-Wno-sign-compare", # Fixable
     "-Wno-implicit-fallthrough", # Probably Fixable
     "-Wno-builtin-requires-header", # Complains about linux::pthread.h
+    "-Wno-incomplete-setjmp-declaration", # Clang complains about glibc pthread.h
     "-Wno-redundant-decls", # Complains about centos::stdio.h
     "-Wno-missing-variable-declarations", # Complains about optreset
 ]