Update FontConfig valgrind suppressions.

FcPattern uses 'intptr_t elts_offsets' instead of 'FcPatternEltPtr elts'
to reference its elements. Therefore, valgrind suspects possible leaks
on all values, elements, and element lists in FontConfig.

BUG=skia:2879
R=djsollen@google.com, mtklein@google.com

Author: bungeman@google.com

Review URL: https://codereview.chromium.org/518903002
1 file changed