Buildsystem/CMake: Change policy CMP0005 to NEW and corect some buildvariables accordingly

** Info from CMake:
**   The OLD behavior for this policy is to place definition values given to add_definitions directly in the generated build rules without attempting to escape anything.
**  The NEW behavior for this policy is to generate correct escapes for all native build tools automatically.

If this breaks build, let us know on irc : irc.rizon.net/#trinity

cmake/compiler/gcc/settings.cmake

@@ -1,5 +1,5 @@
 # Set build-directive (used in core to tell which buildtype we used)
-add_definitions(-D_BUILD_DIRECTIVE='"${CMAKE_BUILD_TYPE}"')
+add_definitions(-D_BUILD_DIRECTIVE="${CMAKE_BUILD_TYPE}")
 
 if(PLATFORM EQUAL 32)
   # Required on 32-bit systems to enable SSE2 (standard on x64)