Add missing HAVE_STDIO_H cmake check

The check is performed by configure, but not with cmake. The
bsdunzip/la_getline.c file checks for presence of this definition.

build/cmake/config.h.in

@@ -1028,6 +1028,9 @@ typedef uint64_t uintmax_t;
 /* Define to 1 if you have the <stdint.h> header file. */
 #cmakedefine HAVE_STDINT_H 1
 
+/* Define to 1 if you have the <stdio.h> header file. */
+#cmakedefine HAVE_STDIO_H 1
+
 /* Define to 1 if you have the <stdlib.h> header file. */
 #cmakedefine HAVE_STDLIB_H 1