[libc] Zero and pattern initialization of heap memory.

Bug: 155227507
Test: scudo_unit_tests

Change-Id: I85075acfd85172f6cc7e48f79eeb577e293d0d30
diff --git a/libc/Android.bp b/libc/Android.bp
index 4c36635..f366ddb 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -88,6 +88,12 @@
         experimental_mte: {
             cflags: ["-DANDROID_EXPERIMENTAL_MTE"],
         },
+        malloc_zero_contents: {
+            cflags: ["-DSCUDO_ZERO_CONTENTS"],
+        },
+        malloc_pattern_fill_contents: {
+            cflags: ["-DSCUDO_PATTERN_FILL_CONTENTS"],
+        },
     },
 }