just use := instead of =

test/malloc/Makefile

@@ -1,7 +1,7 @@
 # uClibc malloc tests
 # Licensed under the GNU Library General Public License, see COPYING.LIB
 
-TESTS = malloc mallocbug realloc0 testmalloc
+TESTS := malloc mallocbug realloc0 testmalloc
 #time_malloc
 
 include ../Test.mak