Boost Logger Implementation

[ShobhitAd]

This PR is ready for review.

Risk

This PR makes no API changes.

Summary

Implements a third party logger for sdl core

CLA

• I have signed the CLA

[iCollin]

Is it possible to make building Core with the boost logger not require sudo?

When building with Boost, I see this warning in the cmake output, could we suppress this?

+CMake Warning (dev) at src/components/utils/CMakeLists.txt:137 (add_dependencies):
+  Policy CMP0046 is not set: Error on non-existent dependency in
+  add_dependencies.  Run "cmake --help-policy CMP0046" for policy details.
+  Use the cmake_policy command to set the policy and suppress this warning.
+
+  The dependency target "install-3rd_party_logger" of target "Utils" does not
+  exist.
+This warning is for project developers.  Use -Wno-dev to suppress it.

[iCollin]

Is sudo necessary for the boost install?

[ShobhitAd]

Is sudo necessary for the boost install?

I don't think sudo is necessary to compile and install the boost components. However, since the 3RD_PARTY_INSTALL_PREFIX is set to /usr/local(https://github.com/smartdevicelink/sdl_core/blob/master/src/3rd_party/set_3rd_party_paths.cmake#L50) we do require special permissions to write to that directory.

The install target could be changed but it would end up affecting more than just the boost libraries(libbson and log4cxx). That said, it looks like sudo is only required for the first time setup(when the library is not found). All subsequent builds will not require sudo.

[jacobkeeler]

Seems this section causes the build to fail if ENABLE_LOG=OFF, maybe move it into the ENABLE_LOG ifdef?

[ShobhitAd]

Resolved in 770ef06