Forgot this change in last commit.

bug:21746693
Change-Id: I1ae9690d393cf1bae10cb06ff1c6754ab2a50595
diff --git a/tools/run-libcore-tests.sh b/tools/run-libcore-tests.sh
index e1f7581..1b8748b 100755
--- a/tools/run-libcore-tests.sh
+++ b/tools/run-libcore-tests.sh
@@ -77,7 +77,7 @@
     # classpath/resources differences when compiling the boot image.
     vogar_args="$vogar_args --vm-arg -Ximage:/non/existent"
     shift
-  elif [[ $1 == "--debug" ]]; then
+  elif [[ "$1" == "--debug" ]]; then
     # Remove the --debug from the arguments.
     vogar_args=${vogar_args/$1}
     vogar_args="$vogar_args --vm-arg -XXlib:libartd.so"