ocaml: phase 5.1 bowling.ml baseline (10-pin bowling score, sample game = 167)

Walks the pin-knockdown list applying strike/spare bonuses through
a 10-frame counter:

  strike (10):           score 10 + next 2 throws,  advance i+1
  spare  (a + b = 10):   score 10 + next 1 throw,   advance i+2
  open  (a + b < 10):    score a + b,                advance i+2

Frame ten special-cases are handled implicitly: the input includes
bonus throws naturally and the while-loop terminates after frame 10.

  bowling_score [10; 7; 3; 9; 0; 10; 0; 8; 8; 2; 0; 6;
                 10; 10; 10; 8; 1]
  = 20+19+9+18+8+10+6+30+28+19
  = 167

131 baseline programs total.

lib/ocaml/baseline/expected.json

@@ -7,6 +7,7 @@
   "anagrams.ml": 3,
   "atm.ml": 120,
   "bag.ml": 3,
+  "bowling.ml": 167,
   "bf_full.ml": 6,
   "bisect.ml": 141,
   "bigint_add.ml": 28,