- Add a configuration keyword "fips" to compile with FIPS

- Add a configuration keyword "fips" to compile with FIPS
  implementations.
- Reorder the build so the standalone FIPS SHA1 checker is built
  first.
- Add necessary defines to avoid symbol clashes between FIPS and
  non-FIPS implementations.
- Change necessary signatures.
- Correct bugs in FIPS build Makefiles.
- make update