Add generic_x86-eng to the lunch menu

Orig-Change-Id: Ie4e0f9054c5bc6ad8845b5b885a00174dd8c9534
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
diff --git a/envsetup.sh b/envsetup.sh
index 287a07a..4d443c9 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -433,6 +433,7 @@
 
 # add the default one here
 add_lunch_combo generic-eng
+add_lunch_combo generic_x86-eng
 
 # if we're on linux, add the simulator.  There is a special case
 # in lunch to deal with the simulator