Bug 1369665 - "mach vendor rust" has to export the OpenSSL lib folder. r=rillian

It's not enough to only export the include folder for openssl, but for
linking the lib folder is also necessary. Also DEP_OPENSSL_INCLUDE
shouldn't be set directly, because it's set by Cargo itself based
on the output of openssl-sys's build script.

MozReview-Commit-ID: Ijbx7STgCXq

--HG--
extra : rebase_source : 9f93d20f974eb85e0e96fdfb017a402a263330ef

python/mozbuild/mozbuild/vendor_rust.py

@@ -86,10 +86,10 @@ Please commit or stash these changes before vendoring, or re-run with `--ignore-
         if os.path.exists('/usr/local/opt/openssl/include/openssl/ssl.h'):
             # Found a likely homebrew install.
             self.log(logging.INFO, 'openssl', {},
-                    'Using OpenSSL in /usr/local/opt/openssl')
+                     'Using OpenSSL in /usr/local/opt/openssl')
             return {
-                 'OPENSSL_INCLUDE_DIR': '/usr/local/opt/openssl/include',
-                 'DEP_OPENSSL_INCLUDE': '/usr/local/opt/openssl/include',
+                'OPENSSL_INCLUDE_DIR': '/usr/local/opt/openssl/include',
+                'OPENSSL_LIB_DIR': '/usr/local/opt/openssl/lib',
             }
 
         self.log(logging.ERROR, 'openssl', {}, "OpenSSL not found!")