Adapt memory.sh to make deprecation

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/scripts/memory.sh b/scripts/memory.sh
index d119374..ffce225 100755
--- a/scripts/memory.sh
+++ b/scripts/memory.sh
@@ -59,8 +59,8 @@
 
     printf "    Executable size... "
 
-    make clean
-    CFLAGS=$CFLAGS_EXEC make OFLAGS=-Os lib >/dev/null 2>&1
+    make -f ./scripts/legacy.make clean
+    CFLAGS=$CFLAGS_EXEC make -f ./scripts/legacy.make OFLAGS=-Os lib >/dev/null 2>&1
     cd programs
     CFLAGS=$CFLAGS_EXEC make OFLAGS=-Os ssl/$CLIENT >/dev/null
     strip ssl/$CLIENT
@@ -69,8 +69,8 @@
 
     printf "    Peak ram usage... "
 
-    make clean
-    CFLAGS=$CFLAGS_MEM make OFLAGS=-Os lib >/dev/null 2>&1
+    make -f ./scripts/legacy.make clean
+    CFLAGS=$CFLAGS_MEM make -f ./scripts/legacy.make OFLAGS=-Os lib >/dev/null 2>&1
     cd programs
     CFLAGS=$CFLAGS_MEM make OFLAGS=-Os ssl/$CLIENT >/dev/null
     cd ..
@@ -103,8 +103,8 @@
 
 printf "building server... "
 
-make clean
-make lib >/dev/null 2>&1
+make -f ./scripts/legacy.make clean
+make -f ./scripts/legacy.make lib >/dev/null 2>&1
 (cd programs && make ssl/ssl_server2) >/dev/null
 cp programs/ssl/ssl_server2 .
 
@@ -123,7 +123,7 @@
 # cleanup
 
 mv $CONFIG_BAK $CONFIG_H
-make clean
+make -f scripts/legacy.make clean
 rm ssl_server2
 
 exit $FAILED