PROTON-2225: adjust valgrind.supp to cover both forms of the leak

[jiridanek]

No description provided.

[codecov-commenter]

Codecov Report

Merging #252 into master will decrease coverage by 9.99%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #252       +/-   ##
===========================================
- Coverage   93.08%   83.09%   -10.00%     
===========================================
  Files          62      339      +277     
  Lines        4177    41362    +37185     
===========================================
+ Hits         3888    34368    +30480     
- Misses        289     6994     +6705     

Impacted Files	Coverage Δ
cpp/src/test_bits.hpp	43.90% <0.00%> (ø)
c/tests/pn_test_proactor.hpp	100.00% <0.00%> (ø)
cpp/src/link.cpp	82.75% <0.00%> (ø)
cpp/include/proton/sender.hpp	28.57% <0.00%> (ø)
c/tests/refcount_test.cpp	100.00% <0.00%> (ø)
cpp/include/proton/value.hpp	100.00% <0.00%> (ø)
cpp/src/receiver_options.cpp	82.45% <0.00%> (ø)
cpp/include/proton/codec/unordered_map.hpp	100.00% <0.00%> (ø)
cpp/src/duration.cpp	83.33% <0.00%> (ø)
cpp/examples/ssl_client_cert.cpp	89.47% <0.00%> (ø)
... and 267 more

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