Allows us to collect profiles of the open source build using gprof.

Grpc tools simplify docker image updates

- also allows it to sync multiple hosts

() --> (void) everywhere in the C core

Cleanup makefiles

Get MSAN, ASAN working for C

Remove grpc_call_accept

This call is deprecated.

Fixing zlib dependency build.

Files that have dependencies on phony targets are always remade, leading
to much unnecessary compiling of the C++ tests.

Allow language to be specified to run_tests.py

They're trivially recreatable from the _OBJS variables now.

If we don't have a .o, we don't need dependencies, so skip the setup
step of building them. Instead, when building the .o, we generate the
.dep and output it (to objs/ to make the rules a little easier). The
next run of make will include the dep file and any dependencies will be
picked up.

This change also disables the disabling of dependency checking if we
have zlib or openssl being compiled from third_party. Additionally it
inverts the logic for including dependencies from ONLY if we are doing a
clean to ONLY if we are NOT doing a clean.

It's safe enough to just delete the build product directories.

These libraries need to see all of the source code, so using system
installed libraries is out of the question.

MSAN, TSAN, ASAN need to see all the code. Valgrind, MSAN want -DPURIFY.

Updates to use the latest version of protobuf-ruby

This resolves issues decoding empty messages.

Various cosmetic improvements to run_tests.py

 -) Fixing long line length.
 -) Changed the logic of the exit message.

Conflicts:
	tools/run_tests/run_tests.py

Helgrind support for run_tests.py

  -) Adding a new command line flag to be able to see which tests are passing.
  -) Adding more status when the tool is idle in forever mode.
  -) Adding a last status when the tool is finished so to avoid leaving the console in a weird state.
  -) Adding a status message in the forever mode if the previous run failed.
  -) Swapped the message and its explanation, so you don't have to scroll up to see which test failed.
  -) Fixed a race condition in the watch_dir.py code if a file is deleted during the loop.

Grpc Tools: update JDK; fix the interop server transport flag

Also allow maxjobs to be tweaked based upon which configs are being run,
to prevent memory starvation.

Muting an extremely chatty log line.