fixes for previous commit

Turns out the Travis environments are less forgiving than my system. Add
missing include. Change subsystem init order in fkr.

src/common.h

@@ -12,6 +12,9 @@
 #include <string.h>
 #include <termios.h>
 #include <wchar.h>
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
 
 #include <memory>
 #include <sstream>

src/fish_key_reader.cpp

@@ -281,9 +281,9 @@ static void setup_and_process_keys(bool continuous_mode) {
     is_interactive_session = 1;  // by definition this program is interactive
     set_main_thread();
     setup_fork_guards();
+    proc_push_interactive(1);
     env_init();
     reader_init();
-    proc_push_interactive(1);
     install_our_signal_handlers();
 
     if (continuous_mode) {