[hosted] Avoid warnings about unsupported -g3 flag

Author: salkinium

tools/build_script_generator/common.py

@@ -233,12 +233,11 @@ def common_compiler_flags(compiler, target):
         "-ffile-prefix-map={project_source_dir}=.",
         "-ffile-prefix-map={gccpath}=.",
 
-        "-g3",
         "-gdwarf-3",
     ]
 
     if target.identifier["platform"] not in ["hosted"]:
-        flags["ccflags"].append("-fshort-wchar")
+        flags["ccflags"].extend(["-fshort-wchar", "-g3"])
     if compiler.startswith("gcc"):
         flags["ccflags"] += [
             "-finline-limit=10000",