loggerd: split bootlog to a separate program (#19831)

* bootlog

* blank lines

* move file_exists to util.h

* src = ['loggerd.cc']

* log_init_data

* Revert "src = ['loggerd.cc']"

This reverts commit 18a587023d75b3a3a54f1ceaf9cb31a51640a067.

* add bootlog to .gitignore

* use s->has_qlog instead of true

* add blank lines & remove extern C
old-commit-hash: f973c56a36

selfdrive/loggerd/SConscript

@@ -1,7 +1,9 @@
 Import('env', 'arch', 'cereal', 'messaging', 'common', 'visionipc', 'gpucommon')
 
-src = ['loggerd.cc', 'logger.cc']
-libs = ['zmq', 'capnp', 'kj', 'z',
+
+logger_lib = env.Library('logger', ["logger.cc"])
+src = ['loggerd.cc']
+libs = [logger_lib, 'zmq', 'capnp', 'kj', 'z',
         'avformat', 'avcodec', 'swscale', 'avutil',
         'yuv', 'bz2', 'OpenCL', common, cereal, messaging, visionipc]
 
@@ -22,3 +24,4 @@ if arch == "Darwin":
   env['FRAMEWORKS'] = ['OpenCL']
 
 env.Program(src, LIBS=libs)
+env.Program('bootlog.cc', LIBS=libs)