Rook PSQT Tuned

This patch uses about half the changes of the SPSA tuning run:
http://tests.stockfishchess.org/tests/view/5dba93d30ebc5925b64ed3bf

About a month ago, xoto10's patch raised the mg value of the third rank
center files from -1 to 7 to encourage rook lifts to the third rank. About
three days later, Rocky's patch lowered this value from 7 to 3. This patch
raises that again from 3 to 12 and ends up greater than the original rook
lift patch.

Passed STC:
LLR: 2.95 (-2.94,2.94) [-1.50,4.50]
Total: 104094 W: 22573 L: 22161 D: 59360
http://tests.stockfishchess.org/tests/view/5dbc77f20ebc5925b64ef1d0

Passed LTC:
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 168291 W: 27410 L: 26777 D: 114104
http://tests.stockfishchess.org/tests/view/5dbd9f1e0ebc5925b64f0647

Bench: 4707799

src/psqt.cpp

@@ -59,14 +59,14 @@ constexpr Score Bonus[][RANK_NB][int(FILE_NB) / 2] = {
    { S(-48,-46), S(  1,-42), S(-14,-37), S(-23,-24) }
   },
   { // Rook
-   { S(-31, -9), S(-20,-13), S(-14,-10), S(-5, -9) },
-   { S(-21,-12), S(-13, -9), S( -8, -1), S( 6, -2) },
-   { S(-25,  6), S(-11, -8), S( -1, -2), S( 3, -6) },
-   { S(-13, -6), S( -5,  1), S( -4, -9), S(-6,  7) },
-   { S(-27, -5), S(-15,  8), S( -4,  7), S( 3, -6) },
-   { S(-22,  6), S( -2,  1), S(  6, -7), S(12, 10) },
-   { S( -2,  4), S( 12,  5), S( 16, 20), S(18, -5) },
-   { S(-17, 18), S(-19,  0), S( -1, 19), S( 9, 13) }
+   { S(-26, -7), S(-19,-15), S( -8,-10), S(-1,-10) },
+   { S(-21,-19), S(-24, -7), S( -6,  0), S( 5, -1) },
+   { S(-29, -1), S(-20, -4), S(  6,  8), S(12,-19) },
+   { S(-14, -1), S( -1, -3), S(-12, -8), S(-7, 10) },
+   { S(-37,  1), S( -6, 13), S(  0, 14), S(10,  4) },
+   { S(-16,  9), S( -1, 15), S(  4, -8), S( 1, 16) },
+   { S( -1,  2), S( 10,  4), S( 13, 23), S(23, -4) },
+   { S( -2, 21), S(-21, -3), S(  4, 26), S(-1, 20) }
   },
   { // Queen
    { S( 3,-69), S(-5,-57), S(-5,-47), S( 4,-26) },