Incremental C++ Build

NINJA-config.sh                                 108
asdl/NINJA_subgraph.py                           56
bin/NINJA_subgraph.py                           196
build/ninja-rules-cpp.sh                        448
build/ninja-rules-py.sh                         369
build/ninja_lib.py                              749
build/ninja_lib_test.py                         260
build/ninja_main.py                             535
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                         444
osh/NINJA_subgraph.py                            32
pea/NINJA_subgraph.py                            19
prebuilt/NINJA_subgraph.py                       79
yaks/NINJA_subgraph.py                           82
ysh/NINJA_subgraph.py                            39

3,960 lines in 20 files