Add HOST_PREFER_32_BIT to support 32-bit-by-default multilib build

We already support pure 32-bit and 64-bit-by-default multilib build.
With HOST_PREFER_32_BIT we can build 32-bit-by-default multilib build.
This will be lest disruptive during the period we transition to
64-bit-by-default.

Bug: 13751317
Change-Id: I0d56ce4abbe4afeaacfd70d709f6a349791c0722
diff --git a/core/install_jni_libs.mk b/core/install_jni_libs.mk
index b9e70b1..700d106 100644
--- a/core/install_jni_libs.mk
+++ b/core/install_jni_libs.mk
@@ -36,7 +36,7 @@
 endif
 
 # App-specific lib path.
-my_app_lib_path :=  $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET$(partition_tag)_OUT_SHARED_LIBRARIES)/$(basename $(LOCAL_INSTALLED_MODULE_STEM))
+my_app_lib_path :=  $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET$(partition_tag)_OUT_SHARED_LIBRARIES)/$(basename $(my_installed_module_stem))
 my_extracted_jni_libs :=
 
 ifdef my_embed_jni