Bundle ggml-cpp.h for Metal runtime compile

ggml-backend-meta.cpp #includes "ggml-cpp.h", which wasn't in the bundle
because no previously bundled source needed it. Without this, on macOS
the on-the-fly metal dylib compile fails with:

  ~/.llamafile/v/X.Y.Z/ggml-backend-meta.cpp:6:10: fatal error:
    'ggml-cpp.h' file not found

Yoink + extract-map + LLAMAFILE_METAL_SOURCES updated.

Author: aittalam

llamafile/BUILD.mk

@@ -242,6 +242,7 @@ LLAMAFILE_METAL_SOURCES := \
 	o/$(MODE)/llama.cpp/ggml/include/ggml-cpu.h.zip.o \
 	o/$(MODE)/llama.cpp/ggml/include/ggml-alloc.h.zip.o \
 	o/$(MODE)/llama.cpp/ggml/include/ggml-backend.h.zip.o \
+	o/$(MODE)/llama.cpp/ggml/include/ggml-cpp.h.zip.o \
 	o/$(MODE)/llama.cpp/ggml/include/ggml-metal.h.zip.o \
 	o/$(MODE)/llama.cpp/ggml/src/ggml-impl.h.zip.o \
 	o/$(MODE)/llama.cpp/ggml/src/ggml-common.h.zip.o \

llamafile/metal.c

@@ -64,6 +64,7 @@ __static_yoink("llama.cpp/ggml/include/gguf.h");
 __static_yoink("llama.cpp/ggml/include/ggml-cpu.h");
 __static_yoink("llama.cpp/ggml/include/ggml-alloc.h");
 __static_yoink("llama.cpp/ggml/include/ggml-backend.h");
+__static_yoink("llama.cpp/ggml/include/ggml-cpp.h");
 __static_yoink("llama.cpp/ggml/include/ggml-metal.h");
 __static_yoink("llama.cpp/ggml/src/ggml-impl.h");
 __static_yoink("llama.cpp/ggml/src/ggml-common.h");
@@ -97,6 +98,7 @@ static const struct MetalSource {
     {"/zip/llama.cpp/ggml/include/ggml-cpu.h", "ggml-cpu.h"},
     {"/zip/llama.cpp/ggml/include/ggml-alloc.h", "ggml-alloc.h"},
     {"/zip/llama.cpp/ggml/include/ggml-backend.h", "ggml-backend.h"},
+    {"/zip/llama.cpp/ggml/include/ggml-cpp.h", "ggml-cpp.h"},
     {"/zip/llama.cpp/ggml/include/ggml-metal.h", "ggml-metal.h"},
     {"/zip/llama.cpp/ggml/src/ggml-impl.h", "ggml-impl.h"},
     {"/zip/llama.cpp/ggml/src/ggml-common.h", "ggml-common.h"},