eclass-overlay: Add adb user & group.

BUG=chromium:538641
TEST=adb user created on moblab.

Change-Id: If9320e00c948da035f675c1227a4259866538542
Reviewed-on: https://chromium-review.googlesource.com/303655
Commit-Ready: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/profiles/base/accounts/group/adb b/profiles/base/accounts/group/adb
new file mode 100644
index 0000000..371511e
--- /dev/null
+++ b/profiles/base/accounts/group/adb
@@ -0,0 +1,3 @@
+group:adb
+gid:269
+users:adb
diff --git a/profiles/base/accounts/user/adb b/profiles/base/accounts/user/adb
new file mode 100644
index 0000000..91a7a53
--- /dev/null
+++ b/profiles/base/accounts/user/adb
@@ -0,0 +1,7 @@
+user:adb
+uid:269
+gid:269
+password:x
+gecos:Android Debug Bridge User
+home:/home/adb
+shell:/bin/sh