FTBFS on older arm
0.3.5.1-alpha failed to build on arm64/armhf/armel jessie, stretch (only arm64), trusty, xenial, and artful.
Looking at some of the logs, this comes up repeatedly:
src/lib/libtor-crypt-ops.a(src_lib_libtor_crypt_ops_a-aes_openssl.o): In function `aes_set_iv': ./build/../src/lib/crypt_ops/aes_openssl.c:399: undefined reference to `get_uint32' ./build/../src/lib/crypt_ops/aes_openssl.c:400: undefined reference to `get_uint32' ./build/../src/lib/crypt_ops/aes_openssl.c:401: undefined reference to `get_uint32'
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