build: fix ./configure --enable-d8

Add SHARED_INTERMEDIATE_DIR to the include path because that is where
Torque-generated files live. d8.cc includes files from deps/v8/src
that depend on those generated files.

PR-URL: #23656
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Gus Caplan <me@gus.host>

deps/v8/gypfiles/d8.gyp

@@ -23,6 +23,7 @@
       'include_dirs+': [
         '..',
         '<(DEPTH)',
+        '<(SHARED_INTERMEDIATE_DIR)',
       ],
       'sources': [
         '../src/d8.h',