runtime: Define runtime_deps as dependencies in dependency_declare

This is required to have compile definitionsa and link flags from
dependencies used for builds including this dependency.

This issue was found through spdlog which has a compile definition
to switch between bundled and external fmtlib and this definition was
available for runtime lib but not for other libraries depending on
runtime lib.

Signed-off-by: Andrej Rode <mail@andrejro.de>

runtime/lib/meson.build

@@ -237,4 +237,5 @@ newsched_runtime_lib = library('newsched-runtime',
     cpp_args : cpp_args)
 
 newsched_runtime_dep = declare_dependency(include_directories : incdir,
+					   dependencies: runtime_deps,
 					   link_with : newsched_runtime_lib)