[flag-types.h] don't assume 32-bit ints

[DJ Delorie]

Since flag-types.h is used in target code, it needs to be -Wall-safe
for targets with 16-bit "int".  OK?

Index: gcc/flag-types.h
===================================================================
--- gcc/flag-types.h    (revision 216287)
+++ gcc/flag-types.h    (working copy)
@@ -229,17 +229,17 @@ enum sanitize_code {
   SANITIZE_RETURN = 1 << 10,
   SANITIZE_SI_OVERFLOW = 1 << 11,
   SANITIZE_BOOL = 1 << 12,
   SANITIZE_ENUM = 1 << 13,
   SANITIZE_FLOAT_DIVIDE = 1 << 14,
   SANITIZE_FLOAT_CAST = 1 << 15,
-  SANITIZE_BOUNDS = 1 << 16,
-  SANITIZE_ALIGNMENT = 1 << 17,
-  SANITIZE_NONNULL_ATTRIBUTE = 1 << 18,
-  SANITIZE_RETURNS_NONNULL_ATTRIBUTE = 1 << 19,
-  SANITIZE_OBJECT_SIZE = 1 << 20,
+  SANITIZE_BOUNDS = 1UL << 16,
+  SANITIZE_ALIGNMENT = 1UL << 17,
+  SANITIZE_NONNULL_ATTRIBUTE = 1UL << 18,
+  SANITIZE_RETURNS_NONNULL_ATTRIBUTE = 1UL << 19,
+  SANITIZE_OBJECT_SIZE = 1UL << 20,
   SANITIZE_UNDEFINED = SANITIZE_SHIFT | SANITIZE_DIVIDE | SANITIZE_UNREACHABLE
                       | SANITIZE_VLA | SANITIZE_NULL | SANITIZE_RETURN
                       | SANITIZE_SI_OVERFLOW | SANITIZE_BOOL | SANITIZE_ENUM
                       | SANITIZE_BOUNDS | SANITIZE_ALIGNMENT
                       | SANITIZE_NONNULL_ATTRIBUTE
                       | SANITIZE_RETURNS_NONNULL_ATTRIBUTE