meta-facebook: minerva: Assign OBMC_CONSOLE_TTYS value

Due to OBMC_CONSOLE_TTYS:fb-nohost assign empty by fb-console.inc, so add in obmc-console_%.bbappend that the obmc-console-client can work.

Change-Id: I1213b71b0ec693408f55ffa06a15ff2902c91d2d
Signed-off-by: Yang Chen <yang.chen@quantatw.com>
diff --git a/meta-facebook/meta-minerva/recipes-phosphor/console/obmc-console_%.bbappend b/meta-facebook/meta-minerva/recipes-phosphor/console/obmc-console_%.bbappend
index 020a00b..f60b2d6 100644
--- a/meta-facebook/meta-minerva/recipes-phosphor/console/obmc-console_%.bbappend
+++ b/meta-facebook/meta-minerva/recipes-phosphor/console/obmc-console_%.bbappend
@@ -2,7 +2,7 @@
 
 inherit obmc-phosphor-systemd
 
-OBMC_CONSOLE_HOST_TTY = "ttyS5"
+OBMC_CONSOLE_TTYS:fb-nohost:append = " ttyS5"
 
 SRC_URI:append = " \
     file://80-minerva-obmc-console-uart.rules \