ash: force inlining of a trivial function

function                                             old     new   delta
bltinlookup                                            5       -      -5

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash.c

@@ -2224,7 +2224,7 @@ reinit_unicode_for_ash(void)
 /*
  * Search the environment of a builtin command.
  */
-static inline const char *
+static ALWAYS_INLINE const char *
 bltinlookup(const char *name)
 {
 	return lookupvar(name);