meson: move tsan-blacklist.txt to build-support with the other build support files

Fixes: 0d46e0e ("meson: Add blacklist when compiling with tsan")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28996>

Author: 1ace

tsan-blacklist.txt build-support/tsan-blacklist.txt

@@ -1923,7 +1923,7 @@ if get_option('b_sanitize') == 'thread'
   # meson versions prior to 1.4 will warn "Consider using the built-in option for sanitizers ..." 
   # later on because it only checks whether the option starts with "-fsanitize",
   # but there is no built-in option for adding a blacklist
-  tsan_blacklist = '-fsanitize-blacklist=@0@'.format(join_paths(meson.project_source_root(), 'tsan-blacklist.txt'))
+  tsan_blacklist = '-fsanitize-blacklist=@0@'.format(join_paths(meson.project_source_root(), 'build-support', 'tsan-blacklist.txt'))
   if cc.has_argument(tsan_blacklist)
     pre_args += tsan_blacklist
   else