runtest/syscalls: temporarily disable mallinfo01

The test sometimes fails because it assumes that:

- malloc() will never increase ordblks
- free() will allways increase ordblks

Which are not valid assumptions and the test needs major redesign.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>
Reported-by: Martin Doucha <mdoucha@suse.cz>
Acked-by: Yang Xu <xuyang2018.jy@fujitsu.com>

runtest/syscalls

@@ -690,7 +690,6 @@ lstat01_64 lstat01_64
 lstat02 lstat02
 lstat02_64 lstat02_64
 
-mallinfo01 mallinfo01
 mallinfo02 mallinfo02
 
 mallopt01 mallopt01