deps: fix OPENSSLDIR on Windows

Backslashes and spaces are need to be escaped to define OPENSSLDIR to
"C:\Program Files\Common Files\SSL".

PR-URL: #29456
Refs: #29455
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

deps/openssl/openssl_common.gypi

@@ -24,7 +24,7 @@
     }, 'OS=="win"', {
       'defines': [
         ## default of Win. See INSTALL in openssl repo.
-        'OPENSSLDIR="C:\Program Files\Common Files\SSL"',
+        'OPENSSLDIR="C:\\\Program\ Files\\\Common\ Files\\\SSL"',
         'ENGINESDIR="NUL"',
         'OPENSSL_SYS_WIN32', 'WIN32_LEAN_AND_MEAN', 'L_ENDIAN',
         '_CRT_SECURE_NO_DEPRECATE', 'UNICODE', '_UNICODE',