Incremental C++ Build

NINJA-config.sh                                 134
asdl/NINJA_subgraph.py                           56
bin/NINJA_subgraph.py                           146
build/ninja-rules-cpp.sh                        420
build/ninja-rules-py.sh                         390
build/ninja_lib.py                              568
build/ninja_lib_test.py                         255
build/ninja_main.py                             445
core/NINJA_subgraph.py                           58
cpp/NINJA_subgraph.py                           227
data_lang/NINJA_subgraph.py                      66
display/NINJA_subgraph.py                        16
frontend/NINJA_subgraph.py                      177
mycpp/NINJA_subgraph.py                         482
osh/NINJA_subgraph.py                            32
pea/NINJA_subgraph.py                            19
prebuilt/NINJA_subgraph.py                       79
yaks/NINJA_subgraph.py                           96
ysh/NINJA_subgraph.py                            39

3,705 lines in 20 files