The arc700 target (and probably others) uses uclibc as it's c-library. However,
uClibc's libcrypt seems to not support the crypt_data struct which broke
the build. This fix adds a new build-target to haproxy which does not use
libcrypt. Summing up, this commit does:
- Add support for uclibc to haproxy with libcrypt disabled
- Add detection of c-library to configure the correct build-target
- Silence additional warnings
- Update patches

Signed-off-by: Christian Lachner <gladiac@gmail.com>