[gimp/gimp-2-10] devel-docs: update debugging-tips with GEGL's meson option names.

[Jehan <jehanp src gnome org>]

commit 694ce3fd54459d6dcc0d49c382ddf55082ce2826
Author: Jehan <jehan girinstud io>
Date:   Tue May 5 18:40:36 2020 +0200

    devel-docs: update debugging-tips with GEGL's meson option names.
    
    (cherry picked from commit 29b1d91b76bdc75ec17b5ce5840315d35d457bb9)

 devel-docs/debugging-tips.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/devel-docs/debugging-tips.txt b/devel-docs/debugging-tips.txt
index 1609c6a950..582e76d841 100644
--- a/devel-docs/debugging-tips.txt
+++ b/devel-docs/debugging-tips.txt
@@ -54,8 +54,9 @@ You may encounter this kind of warning upon exiting GIMP:
 
> EEEEeEeek! 2 GeglBuffers leaked
 
-To debug GeglBuffer leaks, make sure you built GEGL with --enable-debug
-and set the environment variable GEGL_DEBUG to "buffer-alloc".
+To debug GeglBuffer leaks, make sure you built GEGL with -Dbuildtype=debug
+or -Dbuildtype=debugoptimized, and set the environment variable
+GEGL_DEBUG to "buffer-alloc".
 Your system also needs to have the header "execinfo.h".
 
 ## Debugging babl ##