coccinelle: Updating ignore_return to support memcpy

The return of memcpy was being ignored just like memset's return. Just
adding it to coccinelle script.

MISRA-C rule 17.7

Signed-off-by: Flavio Ceolin <[email protected]>

Author: Flavio Ceolin

scripts/coccinelle/ignore_return.cocci

@@ -1,7 +1,7 @@
 /// Cast void to memset to ignore its return value
 ///
-//# The return of memset is never checked and therefore cast
-//# it to void to explicitly ignore while adhering to MISRA-C.
+//# The return of memset and memcpy is never checked and therefore
+//# cast it to void to explicitly ignore while adhering to MISRA-C.
 //
 // Confidence: High
 // Copyright (c) 2017 Intel Corporation
@@ -13,7 +13,10 @@ virtual patch
 @depends on patch && !(file in "ext")@
 expression e1,e2,e3;
 @@
-
+(
 + (void)
 memset(e1,e2,e3);
-
+|
++ (void)
+memcpy(e1,e2,e3);
+)