Install the prebuilt heapprofd_client_api library in the ART chroot.

Also add it to the Golem target.

Test: art/tools/buildbot-build.sh
  with heapprofd_client_api.so libs in
  prebuilts/runtime/mainline/platform/impl/
Test: Set up chroot, then run
      adb shell chroot data/local/art-test-chroot \
        /apex/com.android.art/bin/art/x86/art_cmdline_tests
Test: art/tools/golem/build-target.sh --golem=art-jit \
        --machine-type=android-armv8
  on master-art, and check that
  out/x86_64/target/product/armv8/system/lib64/heapprofd_client_api.so
  exists
Bug: 179915934
Change-Id: I96b143f3f247728779907fe5543ff206a8aa243e
diff --git a/tools/buildbot-build.sh b/tools/buildbot-build.sh
index 2453ca1..d89d47d 100755
--- a/tools/buildbot-build.sh
+++ b/tools/buildbot-build.sh
@@ -141,7 +141,11 @@
   # testing, we need to install an implementation of the libraries (and cannot
   # rely on the one already installed on the device, if the device is post R and
   # has it).
-  implementation_libs="libartpalette-system.so liblog.so"
+  implementation_libs=(
+    "heapprofd_client_api.so"
+    "libartpalette-system.so"
+    "liblog.so"
+  )
   if [ -d prebuilts/runtime/mainline/platform/impl ]; then
     if [[ $TARGET_ARCH = arm* ]]; then
       arch32=arm
@@ -150,7 +154,7 @@
       arch32=x86
       arch64=x86_64
     fi
-    for so in $implementation_libs; do
+    for so in ${implementation_libs[@]}; do
       if [ -d "$ANDROID_PRODUCT_OUT/system/lib" ]; then
         cmd="cp -p prebuilts/runtime/mainline/platform/impl/$arch32/$so $ANDROID_PRODUCT_OUT/system/lib/$so"
         echo "Executing $cmd"