[translation] Make mycpp-souffle the default!

I still have to change the benchmarks to compare against
'mycpp-nosouffle' instead of 'mycpp-souffle'

Author: Andy C

metrics/source-code.sh

@@ -262,7 +262,7 @@ gen-cpp-counts() {
   shift
 
   # NOTE: this excludes .re2c.h file
-  ls _gen/*/*.{cc,h} | $count \
+  ls _gen/*/*.{cc,h} | egrep -v -- '-souffle|-nosouffle' | $count \
     'Generated C++ Code' \
     'mycpp generates the big file _gen/bin/oils-for-unix.mycpp.cc.  Other programs like Zephyr ASDL and re2c generate other files.' \
     "$@"

mycpp/mycpp_main.py

@@ -259,8 +259,8 @@ def main(argv: List[str]) -> int:
 
 """)
 
-    # Awkwardness for Python optparse
-    minimize_stack_roots = False
+    # This logic works around the Python optparse API
+    minimize_stack_roots = True
     if opts.minimize_stack_roots:
         minimize_stack_roots = True
     if opts.no_minimize_stack_roots: