serial-getty service: Add xterm as default TERM

In poky with systemd enabled, vt102 is selected for getty causing user to experience a very crappy terminal. Default TERM to xterm.

---
v2: Removed PR bump.
v3: Changed TERM to xterm than linux, pass -8 to getty.
v4: Corrected patch title (Sorry!)

 .../systemd-serialgetty/[email protected]      |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

index 865de34..6dd335c 100644
@@ -20,7 +20,8 @@ Before=getty.target
 IgnoreOnIsolate=yes
 
 [Service]
-ExecStart=-/sbin/agetty --keep-baud %I @BAUDRATE@ $TERM
+Environment="TERM=xterm"
+ExecStart=-/sbin/agetty -8 --keep-baud %I @BAUDRATE@ $TERM
 Type=idle
 Restart=always
 RestartSec=0

1.7.9.5