uefi-config: fix title for Android builds

The "android" enviroment variable wasn't being set, so Android configs
were labelled as Ubuntu in the title field.

Signed-off-by: Ryan Harkin <ryan.harkin@linaro.org>
diff --git a/uefi-config b/uefi-config
index b705519..79a0071 100755
--- a/uefi-config
+++ b/uefi-config
@@ -114,6 +114,7 @@
 while [ "$1" != "" ]; do
     case $1 in
 		-a | --android )
+			android=1
 			UEFI_CMDLINE=$KERNEL_CMDLINE_ANDROID
 			;;
         -b | --bootmenu )