missing include

>getopt.c:386:30: error: call to undeclared library function 'strcmp' with type 'int (const char *, const char *)';
>      ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>  386 |       if (optind != argc && !strcmp (argv[optind], "--"))
>      |                              ^

Signed-off-by: Nicolas PARLANT <nicolas.parlant@parhuet.fr>

src/getopt.c

@@ -52,6 +52,7 @@ char *alloca ();
 #endif
 
 #include <stdio.h>
+#include <string.h>
 
 /* Comment out all this code if we are using the GNU C Library, and are not
    actually compiling the library itself.  This code is part of the GNU C