BUILD: hpack: include global.h for the trash that is needed in debug mode

When building with -DDEBUG_HPACK, the trash is needed, but it's declared
in global.h.

This may be backported to all supported versions.

(cherry picked from commit 7d84439b4859915fd9dcfa9362109c402c867b96)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 57724cab01d54f50f0b97c86aa604df033b39fec)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 115dbf374cd65ae10ef74d99540a8a7637583d4d)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 41d2efe5254d9c700a232fc3fc3a9bef3b6a1669)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
diff --git a/src/hpack-dec.c b/src/hpack-dec.c
index 4fa9bfd..04f3d9f 100644
--- a/src/hpack-dec.c
+++ b/src/hpack-dec.c
@@ -32,6 +32,7 @@
 
 #include <import/ist.h>
 #include <haproxy/chunk.h>
+#include <haproxy/global.h>
 #include <haproxy/h2.h>
 #include <haproxy/hpack-dec.h>
 #include <haproxy/hpack-huff.h>