Add a DEX2OAT_BOOTCLASSPATH variable.

Bug: 119800099
Test: m
Change-Id: I8ae4ecea6da2ef541736a38822b100a620d72a8a
diff --git a/rootdir/Android.mk b/rootdir/Android.mk
index 8754fb5..d2125d8 100644
--- a/rootdir/Android.mk
+++ b/rootdir/Android.mk
@@ -191,6 +191,7 @@
 	@echo "Generate: $< -> $@"
 	@mkdir -p $(dir $@)
 	$(hide) sed -e 's?%BOOTCLASSPATH%?$(PRODUCT_BOOTCLASSPATH)?g' $< >$@
+	$(hide) sed -i -e 's?%DEX2OATBOOTCLASSPATH%?$(PRODUCT_DEX2OAT_BOOTCLASSPATH)?g' $@
 	$(hide) sed -i -e 's?%SYSTEMSERVERCLASSPATH%?$(PRODUCT_SYSTEM_SERVER_CLASSPATH)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_ASAN_OPTIONS%?$(EXPORT_GLOBAL_ASAN_OPTIONS)?g' $@
 	$(hide) sed -i -e 's?%EXPORT_GLOBAL_GCOV_OPTIONS%?$(EXPORT_GLOBAL_GCOV_OPTIONS)?g' $@