Add --enable-fips for linking with fipscheck library.

Initialize binary and library selfcheck if running in FIPS mode.

(Actually available only on Fedora/Red Hat distros.)

lib/internal.h

@@ -35,6 +35,7 @@
 #include "utils_crypt.h"
 #include "utils_loop.h"
 #include "utils_dm.h"
+#include "utils_fips.h"
 
 /* to silent gcc -Wcast-qual for const cast */
 #define CONST_CAST(x) (x)(uintptr_t)