Mark new/delete as weak in the NDK stubs.

Test: make ndk
Bug: None
Change-Id: I76eef4f0265e87ddbad84ac8c5d56225aa240239
diff --git a/libc/libstdc++.map.txt b/libc/libstdc++.map.txt
index 32d5d49..0a242d5 100644
--- a/libc/libstdc++.map.txt
+++ b/libc/libstdc++.map.txt
@@ -1,18 +1,18 @@
 LIBC_O {
   global:
     _ZSt7nothrow; # var
-    _ZdaPv;
-    _ZdaPvRKSt9nothrow_t;
-    _ZdlPv;
-    _ZdlPvRKSt9nothrow_t;
-    _Znaj; # arm x86 mips
-    _ZnajRKSt9nothrow_t; # arm x86 mips
-    _Znam; # arm64 x86_64 mips64
-    _ZnamRKSt9nothrow_t; # arm64 x86_64 mips64
-    _Znwj; # arm x86 mips
-    _ZnwjRKSt9nothrow_t; # arm x86 mips
-    _Znwm; # arm64 x86_64 mips64
-    _ZnwmRKSt9nothrow_t; # arm64 x86_64 mips64
+    _ZdaPv; # weak
+    _ZdaPvRKSt9nothrow_t; # weak
+    _ZdlPv; # weak
+    _ZdlPvRKSt9nothrow_t; # weak
+    _Znaj; # arm x86 mips weak
+    _ZnajRKSt9nothrow_t; # arm x86 mips weak
+    _Znam; # arm64 x86_64 mips64 weak
+    _ZnamRKSt9nothrow_t; # arm64 x86_64 mips64 weak
+    _Znwj; # arm x86 mips weak
+    _ZnwjRKSt9nothrow_t; # arm x86 mips weak
+    _Znwm; # arm64 x86_64 mips64 weak
+    _ZnwmRKSt9nothrow_t; # arm64 x86_64 mips64 weak
     __cxa_guard_abort;
     __cxa_guard_acquire;
     __cxa_guard_release;