bpo-36577: setup.py reports missing OpenSSL again (GH-12746)

[bpo-36146](https://bugs.python.org/issue36146) introduced another regression. In case of missing OpenSSL
libraries or headers, setup.py no longer reported _hashlib and _ssl to
be missing.
Signed-off-by: Christian Heimes <christian@python.org>



https://bugs.python.org/issue36577

Misc/NEWS.d/next/Build/2019-04-09-17-31-47.bpo-36577.34kuUW.rst

+setup.py now correctly reports missing OpenSSL headers and libraries again.

setup.py

@@ -2153,6 +2153,7 @@ class PyBuildExt(build_ext):
         openssl_libs = split_var('OPENSSL_LIBS', '-l')
         if not openssl_libs:
             # libssl and libcrypto not found
+            self.missing.extend(['_ssl', '_hashlib'])
             return None, None
 
         # Find OpenSSL includes
@@ -2160,6 +2161,7 @@ class PyBuildExt(build_ext):
             'openssl/ssl.h', self.inc_dirs, openssl_includes
         )
         if ssl_incs is None:
+            self.missing.extend(['_ssl', '_hashlib'])
             return None, None
 
         # OpenSSL 1.0.2 uses Kerberos for KRB5 ciphers