Add LZ4 tools to the build

Change-Id: Ib7346f85e31b9a8651a3d40c1ccb4c675e584b4c
diff --git a/default.xml b/default.xml
index 891cbc7..1f84ac6 100644
--- a/default.xml
+++ b/default.xml
@@ -241,6 +241,7 @@
   <project path="external/ltrace" name="platform/external/ltrace" groups="pdk-cw-fs" remote="aosp" />
   <project path="external/lzma" name="platform/external/lzma" remote="aosp" />
   <project path="external/lsof" name="CyanogenMod/android_external_lsof" />
+  <project path="external/lz4" name="CyanogenMod/android_external_lz4" />
   <project path="external/lzo" name="CyanogenMod/android_external_lzo" />
   <project path="external/markdown" name="platform/external/markdown" groups="pdk-cw-fs" remote="aosp" />
   <project path="external/mdnsresponder" name="platform/external/mdnsresponder" groups="pdk" remote="aosp" />