dev-embedded/u-boot-tools-2016.03 fails to build with dev-libs/openssl-1.1.0f.

If installed from a pre-built binary package on a system with openssl-1.1 libraries, "mkimage" fails to run with error:

mkimage: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory

This manifests itself when trying to build chromeos-kernel-3_18 on an arm system, as mkimage is used by cros-kernel2.eclass to process device trees.

Build time failure is:

In file included from tools/lib/rsa/rsa-sign.c:1:
./tools/../lib/rsa/rsa-sign.c:213:2: warning: implicit declaration of function 'EVP_MD_CTX_cleanup' is invalid in C99 [-Wimplicit-function-declaration]
        EVP_MD_CTX_cleanup(context);
        ^
./tools/../lib/rsa/rsa-sign.c:279:21: error: incomplete definition of type 'struct rsa_st'
        if (BN_num_bits(key->e) > 64)
                        ~~~^
/usr/include/openssl/ossl_typ.h:110:16: note: forward declaration of 'struct rsa_st'
typedef struct rsa_st RSA;
               ^
In file included from tools/lib/rsa/rsa-sign.c:1:
./tools/../lib/rsa/rsa-sign.c:282:22: error: incomplete definition of type 'struct rsa_st'
        *e = BN_get_word(key->e);
                         ~~~^
/usr/include/openssl/ossl_typ.h:110:16: note: forward declaration of 'struct rsa_st'
typedef struct rsa_st RSA;
               ^
In file included from tools/lib/rsa/rsa-sign.c:1:
./tools/../lib/rsa/rsa-sign.c:284:21: error: incomplete definition of type 'struct rsa_st'
        if (BN_num_bits(key->e) < 33) {
                        ~~~^
/usr/include/openssl/ossl_typ.h:110:16: note: forward declaration of 'struct rsa_st'
typedef struct rsa_st RSA;
               ^
In file included from tools/lib/rsa/rsa-sign.c:1:
./tools/../lib/rsa/rsa-sign.c:289:20: error: incomplete definition of type 'struct rsa_st'
        bn_te = BN_dup(key->e);
                       ~~~^
/usr/include/openssl/ossl_typ.h:110:16: note: forward declaration of 'struct rsa_st'
typedef struct rsa_st RSA;
               ^
In file included from tools/lib/rsa/rsa-sign.c:1:
./tools/../lib/rsa/rsa-sign.c:340:21: error: incomplete definition of type 'struct rsa_st'
        if (!BN_copy(n, key->n) || !BN_set_word(big1, 1L) ||
                        ~~~^
/usr/include/openssl/ossl_typ.h:110:16: note: forward declaration of 'struct rsa_st'
typedef struct rsa_st RSA;
               ^
1 warning and 5 errors generated.
make[1]: *** [scripts/Makefile.host:111: tools/lib/rsa/rsa-sign.o] Error 1