Add full_x86 product.

By inheriting from full, this will be more self-maintaining, and
automatically gets a better-configured variant (e.g. it has locales,
a date format, etc...).

Change-Id: I67b6c2d9f9b7d20cb89154906c3f3d6a5391c838
diff --git a/envsetup.sh b/envsetup.sh
index c0d17a0..202e6c2 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -433,7 +433,7 @@
 
 # add the default one here
 add_lunch_combo full-eng
-add_lunch_combo generic_x86-eng
+add_lunch_combo full_x86-eng
 
 # if we're on linux, add the simulator.  There is a special case
 # in lunch to deal with the simulator