Add support for deprecated loader (#11946)

programs/bpf/c/src/deprecated_loader/deprecated_loader.c

@@ -0,0 +1,23 @@
+/**
+ * @brief Example C-based BPF program that prints out the parameters
+ * passed to it
+ */
+#include <solana_sdk.h>
+#include <deserialize_deprecated.h>
+
+extern uint64_t entrypoint(const uint8_t *input) {
+  SolAccountInfo ka[1];
+  SolParameters params = (SolParameters) { .ka = ka };
+
+  sol_log(__FILE__);
+
+  if (!sol_deserialize_deprecated(input, &params, SOL_ARRAY_SIZE(ka))) {
+    return ERROR_INVALID_ARGUMENT;
+  }
+
+  // Log the provided input parameters.  In the case of  the no-op
+  // program, no account keys or input data are expected but real
+  // programs will have specific requirements so they can do their work.
+  sol_log_params(&params);
+  return SUCCESS;
+}