Redirect FIPS memory allocation to FIPS_malloc() routine, remove
OpenSSL malloc dependencies.

fips/dsa/fips_dsa_lib.c

diff --git a/fips/dsa/fips_dsa_lib.c b/fips/dsa/fips_dsa_lib.c
index 2545966..06f8cab 100644
--- a/fips/dsa/fips_dsa_lib.c
+++ b/fips/dsa/fips_dsa_lib.c
@@ -56,9 +56,12 @@
  *
  */
 
+#define OPENSSL_FIPSAPI
+
 #include <string.h>
 #include <openssl/dsa.h>
 #include <openssl/bn.h>
+#include <openssl/fips.h>
 
 /* Minimal FIPS versions of FIPS_dsa_new() and FIPS_dsa_free: to
  * reduce external dependencies.