python: Remove python/embedded.cc's dependence on the rest of gem5.

If embedded python modules are going to be built into other binaries,
then they can't depend on other parts of gem5.

Change-Id: I4e12f1962cb6330e70866a40388689102c23693a
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/49420
Maintainer: Gabe Black <gabe.black@gmail.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/python/embedded.cc

@@ -45,10 +45,10 @@
 
 #include <zlib.h>
 
+#include <cstdlib>
+#include <iostream>
 #include <list>
 
-#include "base/logging.hh"
-
 namespace py = pybind11;
 
 namespace gem5
@@ -78,8 +78,10 @@ EmbeddedPython::getCode() const
     Bytef marshalled[len];
     uLongf unzlen = len;
     int ret = uncompress(marshalled, &unzlen, (const Bytef *)code, zlen);
-    if (ret != Z_OK)
-        panic("Could not uncompress code: %s\n", zError(ret));
+    if (ret != Z_OK) {
+        std::cerr << "Could not uncompress code: " << zError(ret) << std::endl;
+        std::abort();
+    }
     assert(unzlen == (uLongf)len);
 
     auto marshal = py::module_::import("marshal");