!674 support gn

Merge pull request !674 from xxlight/support_gn

musl_template.gni

@@ -293,7 +293,6 @@ template("musl_libs") {
   source_set("soft_musl_src") {
     sources_orig = []
     sources = []
-    set_sources_assignment_filter([])
 
     sources_orig = musl_src_arch_file + musl_src_file
     sources_orig -= musl_src_filterout

scripts/build_lite/BUILD.gn

@@ -100,8 +100,8 @@ action_foreach("strip") {
   no_default_deps = true
   deps = [ ":build_sysroot" ]
   script = "//build/lite/run_shell_cmd.py"
-  set_sources_assignment_filter([ "*.txt" ])
-  sources = get_target_outputs(deps[0])
+  sources_raw = get_target_outputs(deps[0])
+  sources = filter_exclude(sources_raw, [ "*.txt" ])
   outputs = [ "$root_out_dir/libs/{{source_file_part}}" ]
   args = [
     "$ohos_current_strip_command",