Add /system/vendor/{lib|lib64} to linker args

Add vendor-specific lib directory to ld.mc's library search path.  Since
ld.mc takes multiple search directories, there is no need to derive a
single path at runtime.

bug 20894664

Change-Id: Id62d2acbd94914c70bf4668f553a94a33e2a0587
diff --git a/cpu_ref/rsCpuScript.h b/cpu_ref/rsCpuScript.h
index 22f973b..fc3a0a9 100644
--- a/cpu_ref/rsCpuScript.h
+++ b/cpu_ref/rsCpuScript.h
@@ -153,8 +153,10 @@
 
 #ifdef __LP64__
 #define SYSLIBPATH "/system/lib64"
+#define SYSLIBPATH_VENDOR "/system/vendor/lib64"
 #else
 #define SYSLIBPATH "/system/lib"
+#define SYSLIBPATH_VENDOR "/system/vendor/lib"
 #endif
 
 }