Description of problem:
ninja is commonly installed as just `ninja`, but the fedora package installs a `ninja-build` binary.  gyp doesn't realize this.

Version-Release number of selected component (if applicable):
gyp 0.20.0bb6747git.fc25

How reproducible:
Yep

Steps to Reproduce:
1. Find a package of your choice and run: gyp -f ninja <usual arguments> --build=Debug

Actual results: a stacktrace:
Building [Debug]: ['ninja', '-C', './out/Debug']
Traceback (most recent call last):
  File "/usr/bin/gyp", line 9, in <module>
    load_entry_point('gyp==0.1', 'console_scripts', 'gyp')()
  File "/usr/lib/python2.7/site-packages/gyp/__init__.py", line 532, in script_main
    return main(sys.argv[1:])
  File "/usr/lib/python2.7/site-packages/gyp/__init__.py", line 525, in main
    return gyp_main(args)
  File "/usr/lib/python2.7/site-packages/gyp/__init__.py", line 517, in gyp_main
    generator.PerformBuild(data, options.configs, params)
  File "/usr/lib/python2.7/site-packages/gyp/generator/ninja.py", line 2349, in PerformBuild
    subprocess.check_call(arguments)
  File "/usr/lib64/python2.7/subprocess.py", line 536, in check_call
    retcode = call(*popenargs, **kwargs)
  File "/usr/lib64/python2.7/subprocess.py", line 523, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib64/python2.7/subprocess.py", line 711, in __init__
    errread, errwrite)
  File "/usr/lib64/python2.7/subprocess.py", line 1343, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory


Expected results: a build

Additional info: