BZ 1846705 - Possible memory leak detected in pcp-atop
f30aff90b qa: add valgrind suppressions needed for valgrind 3.16

diff --git a/qa/valgrind-suppress-3.16.0 b/qa/valgrind-suppress-3.16.0
new file mode 100644
index 000000000..515591747
--- /dev/null
+++ b/qa/valgrind-suppress-3.16.0
@@ -0,0 +1,27 @@
+# qa/1080 and qa/490 and qa/386 and qa/459 on Fedora 32
+# at 0x483880B: malloc (vg_replace_malloc.c:299)
+# by 0x4A0D490: tsearch (in /usr/lib64/libc-2.28.so)
+# by 0x4871EA6: __pmFindPDUBuf (pdubuf.c:126)
+# ...
+{
+   tsearch
+   Memcheck:Leak
+   match-leak-kinds: possible
+   fun:malloc
+   fun:tsearch
+   fun:__pmFindPDUBuf
+   ...
+}
+
+# qa/1080 and qa/490 and qa/386 and qa/459 on Fedora 32
+# at 0x483880B: malloc (vg_replace_malloc.c:299)
+# by 0x4871E5F: __pmFindPDUBuf (pdubuf.c:115)
+# ...
+{
+   findpdubuf
+   Memcheck:Leak
+   match-leak-kinds: possible
+   fun:malloc
+   fun:__pmFindPDUBuf
+   ...
+}