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/clear_vars.mk b/core/clear_vars.mk
index 4c403b4..5aa228f 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -197,6 +197,8 @@
 LOCAL_ASFLAGS_64:=
 LOCAL_C_INCLUDES_32:=
 LOCAL_C_INCLUDES_64:=
+LOCAL_MODULE_PATH_32:=
+LOCAL_MODULE_PATH_64:=
 
 # Trim MAKEFILE_LIST so that $(call my-dir) doesn't need to
 # iterate over thousands of entries every time.