Doesn't compile due to missing headers for memcpy and assert

[rabidcopy]

As of the refactor f5a77a6 the program does not compile.

g++ -I. -I./examples -O3 -DNDEBUG -std=c++11 -fPIC -pthread -c llama.cpp -o llama.o
llama.cpp: In function ‘bool llama_eval_internal(llama_context&, const llama_token*, int, int, int)’:
llama.cpp:657:5: error: ‘memcpy’ was not declared in this scope
  657 |     memcpy(embd->data, tokens, N*ggml_element_size(embd));
      |     ^~~~~~
llama.cpp:12:1: note: ‘memcpy’ is defined in header ‘<cstring>’; did you forget to ‘#include <cstring>’?
   11 | #include <cassert>
  +++ |+#include <cstring>
   12 | 
make: *** [Makefile:224: llama.o] Error 1

Adding these to llama.cpp allows it to compile.

#include <cassert>
#include <cstring>

[sw]

Fixed by #386