[libxml2] Disable LeakSanitizer

[Nick Wellnhofer <nwellnhof src gnome org>]

commit 2a7b66846ef419a4da4ed60f863449f3498a1cc5
Author: Nick Wellnhofer <wellnhofer aevum de>
Date:   Mon Mar 2 11:52:52 2020 +0100

    Disable LeakSanitizer
    
    The GitLab runner doesn't run in privileged mode anymore [1], at least
    for projects outside the GNOME group. Disable LeakSanitizer for now
    as it needs the ptrace capability.
    
    [1] https://gitlab.gnome.org/Infrastructure/Infrastructure/issues/251

 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 71f66e0b..de5f4bc6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -33,6 +33,8 @@ clang:asan:
     CONFIG: "--without-python"
     CC: clang
     CFLAGS: "-O2 -g -fno-omit-frame-pointer -fsanitize=address,undefined,unsigned-integer-overflow 
-fno-sanitize-recover=all -Wno-error=cast-align"
+    # LeakSanitizer requires SYS_CAP_PTRACE
+    ASAN_OPTIONS: "detect_leaks=0"
     UBSAN_OPTIONS: "print_stacktrace=1"
 
 clang:msan: