map_block_dumper - create these .blk files

TODO: spit out new INCBIN lines to take advantage of these files.

hg-commit-id: f06654f42d78

maps/route12.blk

@@ -0,0 +1,21 @@
+,,,)1(,,,,,+W%1$WWWW,)CCTCCCC,)CCTCCkk,)CCTCCCC,)TTzTCCC,)TxxTyTT,)TCCTxxx,)TC 
!CC,)xChiCC,)kk7:~kk,)CCCTCCC,)CCCTCCC,)TTTzTTC,)xxxxxTC,)TCCTTTC,)TCCTxxC,)zTTTCTCW%TxxxCTCTCCCCxCzTzTTTCTxTxxxCxCTTTCCCCxxzTCTTTCTxCTxTCTTCTCTTzTCTCxxxxCTTTzTTCxxxTxxC66kkkTCCCLLaaayCCCxxxTCCCCCCTCCCCCCTCCCCCCTCCC
+nCCCTTTC
+nCCCxxTC
+nT111C
+nTwwwwwC
+nTxxxxxC
+nTTTzTCC
+nxxxTxCC
+nl6CTCCC
+n
+5TTCCC
+nl
+xzTTC
+nTTTTxxC
+nxxxTTTC
+nCCCxxTC
+nll3TzTC
+nnxTxC
+nnCTCC
+nnTzCC
+nnTxCC