libstdc++: make operator new call abort on failure.

This change ensures that operator new will call abort() in case
of memory allocation failure. Note that due to our usage of memory
overcommit, this can only happen under very rare circumstances
(i.e. trying to allocate memory larger than the larger free range
of virtual address space, or when memory is corrutped in various
ways).

Change-Id: I128b8bf626216e899c22a00f24492cd148a1fc94

libstdc++/src/new.cpp

@@ -7,7 +7,7 @@ void* operator new(std::size_t size)
 {
     void* p = malloc(size);
     if (p == NULL) {
-        // abort();
+        abort();
     }
     return p;
 }
@@ -16,7 +16,7 @@ void* operator new[](std::size_t size)
 {
     void* p = malloc(size);
     if (p == NULL) {
-        // abort();
+        abort();
     }
     return p;
 }