Disable malloc_info test under HWASan.

HWASan does not implement malloc_info.

Test: bionic-unit-tests with SANITIZE_TARGET=hwaddress
Change-Id: I61d50d9110fbca1784ed39950ed6c5540ca0c9a7
diff --git a/tests/malloc_test.cpp b/tests/malloc_test.cpp
index 9380680..8d5db54 100644
--- a/tests/malloc_test.cpp
+++ b/tests/malloc_test.cpp
@@ -341,6 +341,7 @@
 
 TEST(malloc, malloc_info) {
 #ifdef __BIONIC__
+  SKIP_WITH_HWASAN; // hwasan does not implement malloc_info
   char* buf;
   size_t bufsize;
   FILE* memstream = open_memstream(&buf, &bufsize);