lineage: Bring back unrar

Change-Id: I2cc55d7dd9073d98745e68cde760cd44289aea93
diff --git a/snippets/lineage.xml b/snippets/lineage.xml
index a31ec18..6e60224 100644
--- a/snippets/lineage.xml
+++ b/snippets/lineage.xml
@@ -24,6 +24,7 @@
   <project path="external/openssh" name="LineageOS/android_external_openssh" groups="pdk" />
   <project path="external/rsync" name="LineageOS/android_external_rsync" />
   <project path="external/tinyxml" name="platform/external/tinyxml" groups="pdk" remote="aosp" revision="refs/tags/android-11.0.0_r46" />
+  <project path="external/unrar" name="LineageOS/android_external_unrar" />
   <project path="external/vim" name="LineageOS/android_external_vim" />
   <project path="hardware/lineage/compat" name="LineageOS/android_hardware_lineage_compat" />
   <project path="hardware/lineage/interfaces" name="LineageOS/android_hardware_lineage_interfaces" />