Fix host tests that need the shell.

By making the /system/bin/sh available.

Change-Id: I99200c1ddc922a2f6b5cea8ff2da98aedbe70e7b
diff --git a/tests/Android.mk b/tests/Android.mk
index c7688de..39e9409 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -200,6 +200,7 @@
 bionic-unit-tests-run-on-host: bionic-unit-tests $(TARGET_OUT_EXECUTABLES)/linker
 	mkdir -p $(TARGET_OUT_DATA)/local/tmp
 	cp $(TARGET_OUT_EXECUTABLES)/linker /system/bin
+	cp $(TARGET_OUT_EXECUTABLES)/sh /system/bin
 	ANDROID_DATA=$(TARGET_OUT_DATA) \
 	ANDROID_ROOT=$(TARGET_OUT) \
 	EXTERNAL_STORAGE=$(TARGET_OUT_DATA)/local/tmp \