[scudo] Do not instantiate Android svelte allocator.

[cferris]

Summary

The Android svelte allocator is not used, and will likely require
some configuration and experimentation to find a balanced config.
Leave the svelte config and size map so they can be used as the
basis for the future Android svelte config.

compiler-rt/lib/scudo/standalone/wrappers_c_bionic.cpp

 static scudo::Allocator<scudo::AndroidConfig, SCUDO_PREFIX(malloc_postinit)>
     SCUDO_ALLOCATOR;
 
 #include "wrappers_c.inc"
 
 #undef SCUDO_ALLOCATOR
 #undef SCUDO_PREFIX
 
-// Svelte MallocDispatch definitions.
-#define SCUDO_PREFIX(name) CONCATENATE(scudo_svelte_, name)
-#define SCUDO_ALLOCATOR SvelteAllocator
-
-extern "C" void SCUDO_PREFIX(malloc_postinit)();
-SCUDO_REQUIRE_CONSTANT_INITIALIZATION
-static scudo::Allocator<scudo::AndroidSvelteConfig,
-                        SCUDO_PREFIX(malloc_postinit)>
-    SCUDO_ALLOCATOR;
-
-#include "wrappers_c.inc"
-
-#undef SCUDO_ALLOCATOR
-#undef SCUDO_PREFIX
-
 // TODO(kostyak): support both allocators.
 INTERFACE void __scudo_print_stats(void) { Allocator.printStats(); }
 
 INTERFACE void
 __scudo_get_error_info(struct scudo_error_info *error_info,
                        uintptr_t fault_addr, const char *stack_depot,
                        const char *region_info, const char *ring_buffer,
                        const char *memory, const char *memory_tags,