Added ShaderLoader using shaderc (GCC only)

Signed-off-by: Robear Selwans <robear.selwans@outlook.com>

subprojects/packagefiles/libshaderc/meson.build

@@ -0,0 +1,13 @@
+project('libshaderc', 'cpp')
+
+fs = import('fs')
+cxxc = meson.get_compiler('cpp')
+
+shaderc_inc = include_directories('install/include')
+
+shaderc_dep = declare_dependency(
+  dependencies: cxxc.find_library('shaderc_combined', dirs: meson.current_source_dir()/'install/lib'),
+  include_directories: shaderc_inc,
+)
+
+meson.override_dependency('shaderc', shaderc_dep)