Disable LTO for now, it breaks the build

This is the error I get building locally if LTO is not disabled:
  Error: invalid attempt to declare external version name as default
  in symbol `kcapi_memset_secure@@LIBKCAPI_1.3.1'

Signed-off-by: Simo Sorce <simo@redhat.com>

libkcapi.spec

@@ -1,3 +1,5 @@
+%global _lto_cflags %nil
+
 # Shared object version of libkcapi.
 %global vmajor            1
 %global vminor            3