Merge pull request #1127 from KFilipek/libunwind

tests: add libunwind suppresion

Author: lukaszstolarczuk

tests/memcheck-libunwind.supp

@@ -21,3 +21,17 @@
    obj:*libunwind*
    ...
 }
+{
+   libunwind calls glibc's setcontext on some architectures, e.g. ppc
+   Memcheck:Addr8
+   fun:setcontext*
+   ...
+}
+{
+   libunwind exception suppresion
+   Memcheck:Param
+   write(buf)
+   ...
+   obj:*libunwind*
+   ...
+}