Set OpenSSL rpath properly.

Makefile overrides LDFLAGS and SHARED_LDFLAGS environment variables, thus the
resulting shared library didn't have RPATH set and libssl as well as engines
ending up not using SlapOS libcrypto.

component/openssl/buildout.cfg

@@ -35,11 +35,10 @@ configure-options =
   --libdir=lib
   shared
   no-zlib
+  -Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${buildout:parts-directory}/${:_buildout_section_name_}/lib"
 
 # it seems that parallel build sometimes fails for openssl.
 make-options =
   -j1
 make-targets =
   install && rm -f ${buildout:parts-directory}/${:_buildout_section_name_}/etc/ssl/certs/* && for i in ${ca-certificates:location}/certs/*/*.crt; do ln -sv $i ${buildout:parts-directory}/${:_buildout_section_name_}/etc/ssl/certs/`${buildout:parts-directory}/${:_buildout_section_name_}/bin/openssl x509 -hash -noout -in $i`.0; done; true
-  LDFLAGS="-Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${buildout:parts-directory}/${:_buildout_section_name_}/lib"
-  SHARED_LDFLAGS="-Wl,-rpath=${zlib:location}/lib -Wl,-rpath=${buildout:parts-directory}/${:_buildout_section_name_}/lib"