Build keystore in 32 bit on platforms that require it.

Change-Id: I29543f72ef677870aa3f108c1ae4cb029df2f871
diff --git a/softkeymaster/Android.mk b/softkeymaster/Android.mk
index 7eee9c5..0c733aa 100644
--- a/softkeymaster/Android.mk
+++ b/softkeymaster/Android.mk
@@ -15,6 +15,9 @@
 LOCAL_PATH := $(call my-dir)
 
 include $(CLEAR_VARS)
+ifeq ($(USE_32_BIT_KEYSTORE), true)
+LOCAL_MULTILIB := 32
+endif
 LOCAL_MODULE := keystore.default
 LOCAL_MODULE_RELATIVE_PATH := hw
 LOCAL_SRC_FILES := module.cpp
@@ -28,6 +31,9 @@
 include $(BUILD_SHARED_LIBRARY)
 
 include $(CLEAR_VARS)
+ifeq ($(USE_32_BIT_KEYSTORE), true)
+LOCAL_MULTILIB := 32
+endif
 LOCAL_MODULE := libsoftkeymaster
 LOCAL_SRC_FILES := keymaster_openssl.cpp
 LOCAL_C_INCLUDES := \