Merge pull request #97 from riscv/keepalive

Add some keep_alive()s for use with slow targets.

src/target/riscv/batch.c

@@ -49,6 +49,8 @@ void riscv_batch_run(struct riscv_batch *batch)
 		return;
 	}
 
+  keep_alive();
+
 	LOG_DEBUG("running a batch of %ld scans", (long)batch->used_scans);
 	riscv_batch_add_nop(batch);
 

src/target/riscv/program.c

@@ -41,6 +41,8 @@ int riscv_program_init(struct riscv_program *p, struct target *target)
 
 int riscv_program_exec(struct riscv_program *p, struct target *t)
 {
+	keep_alive();
+
 	if (riscv_debug_buffer_leave(t, p) != ERROR_OK) {
 		LOG_ERROR("unable to write program buffer exit code");
 		return ERROR_FAIL;