add support for LOCAL_MODULE_PATH_32 and LOCAL_MODULE_PATH_64

Some executables will need to be built for both 32-bit and 64-bit.
For tests, it will be convienient to keep the name of the executable
the same, but install them in a different location.  Add
LOCAL_MODULE_PATH_32 and LOCAL_MODULE_PATH_64 to allow a module
to specify different paths for 32-bit and 64-bit executables.

Change-Id: I3be830e899c6d485fe55c25c66b20b3fe64c795e
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 32e6b73..051addc 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -99,8 +99,21 @@
   $(error $(LOCAL_PATH): LOCAL_MODULE_CLASS must contain exactly one word, not "$(LOCAL_MODULE_CLASS)")
 endif
 
+ifndef LOCAL_IS_HOST_MODULE
+my_32_64_bit_suffix := $(if $($(LOCAL_2ND_ARCH_VAR_PREFIX)TARGET_IS_64_BIT),64,32)
+endif
+
 ifneq (true,$(LOCAL_UNINSTALLABLE_MODULE))
+ifndef LOCAL_IS_HOST_MODULE
+my_multilib_module_path := $(strip $(LOCAL_MODULE_PATH_$(my_32_64_bit_suffix)))
+else
+my_multilib_module_path :=
+endif
+ifdef my_multilib_module_path
+my_module_path := $(my_multilib_module_path)
+else
 my_module_path := $(strip $(LOCAL_MODULE_PATH))
+endif
 my_module_relative_path := $(strip $(LOCAL_MODULE_RELATIVE_PATH))
 ifeq ($(my_module_path),)
   ifdef LOCAL_IS_HOST_MODULE