chromeos-installer: add altair-firmware dependency when USE=internal

This CL is intended only for the 'stabilize-springlte-5116.46.B' branch.

BUG=chrome-os-partner:23225
TEST=`USE=internal FEATURES=test emerge-{x86,amd64,arm}-generic chromeos-installer`
TEST=`USE=internal equery-{x86,amd64,arm}-generic g chromeos-installer-9999` includes chromeos-base/altair-firmware

Change-Id: I34f1e3c190bbeb27472bc68bd9ff7dba41d94901
Reviewed-on: https://chromium-review.googlesource.com/183936
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
diff --git a/chromeos-base/chromeos-installer/chromeos-installer-9999.ebuild b/chromeos-base/chromeos-installer/chromeos-installer-9999.ebuild
index 418263c..124288e 100644
--- a/chromeos-base/chromeos-installer/chromeos-installer-9999.ebuild
+++ b/chromeos-base/chromeos-installer/chromeos-installer-9999.ebuild
@@ -15,7 +15,7 @@
 LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86"
-IUSE="32bit_au cros_host pam"
+IUSE="32bit_au cros_host internal pam"
 
 DEPEND="
 	chromeos-base/verity
@@ -27,6 +27,7 @@
 	pam? ( app-admin/sudo )
 	chromeos-base/vboot_reference
 	dev-util/shflags
+	internal? ( chromeos-base/altair-firmware )
 	sys-apps/rootdev
 	sys-apps/util-linux
 	sys-apps/which