Revert^8 "Make sure that const-class linkage is preserved."

Replaced two ReaderMutexLocks with WriterMutexLocks.
Removed some unnecessary debugging output.

Test: m test-art-host
Bug: 30627598
Original-Change-Id: Ie9b721464b4e9a5dcce8df8095548e983bba1fe8

This reverts commit 2c8c6b63da6ecb2ac701cc30f9b4fa4a8eea5cc8.

Change-Id: I3a1aeecf64e4b202cef61cceb248d48106a2f4a6
diff --git a/test/etc/default-build b/test/etc/default-build
index f2b5078..51ae175 100755
--- a/test/etc/default-build
+++ b/test/etc/default-build
@@ -273,8 +273,10 @@
 fi
 
 # Create a single jar with two dex files for multidex.
-if [ ${HAS_SRC_MULTIDEX} = "true" ] || [ ${HAS_SMALI_MULTIDEX} = "true" ]; then
-  zip $TEST_NAME.jar classes.dex classes2.dex
-elif [ ${NEED_DEX} = "true" ]; then
-  zip $TEST_NAME.jar classes.dex
+if [ ${NEED_DEX} = "true" ]; then
+  if [ ${HAS_SRC_MULTIDEX} = "true" ] || [ ${HAS_SMALI_MULTIDEX} = "true" ]; then
+    zip $TEST_NAME.jar classes.dex classes2.dex
+  else
+    zip $TEST_NAME.jar classes.dex
+  fi
 fi