Add missing libz4.so for Golem builds.

It's a new shared library dependency since
https://r.android.com/1428533.

Test: lunch silvermont
  m CUSTOM_TARGET_LINKER=$PWD/out/target/product/silvermont/system/bin/linker ART_TARGET_LINUX=true build-art-target-golem
  env ANDROID_I18N_ROOT=$PWD/out/target/product/silvermont/system/apex/com.android.i18n ANDROID_TZDATA_ROOT=$PWD/out/target/product/silvermont/system/etc/tzdata_module out/target/product/silvermont/system/bin/art --32 -Ximage:$PWD/out/target/product/silvermont/system/apex/com.android.art/javalib/boot.art -cp java-benchmarks-v3.dex benchmarks.AhatBench.java.AhatBench
Bug: 118374951
Change-Id: I26f32e2c0eef8ec940378145ab02f1ce48564682
diff --git a/Android.mk b/Android.mk
index 1fa414d..881344a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -697,6 +697,7 @@
                         $(ART_TARGET_SHARED_LIBRARY_BENCHMARK) \
                         $(ART_TARGET_SHARED_LIBRARY_PALETTE_DEPENDENCIES) \
                         $(TARGET_OUT_SHARED_LIBRARIES)/libz.so \
+                        $(TARGET_OUT_SHARED_LIBRARIES)/liblz4.so \
                         libartpalette-system \
                         tzdata-art-test-tzdata tzlookup.xml-art-test-tzdata \
                         tz_version-art-test-tzdata icu_overlay-art-test-tzdata \