Add header_libs to cc_object

Needed to allow removal of the include_dirs property from the
asm_defines.s module. Also, adds ObjectLinkerProperties to cc_defaults
so that default settings of header_libs are correctly prepended to the
properties in cc_object.

Bug: 35624006
Test: m cpp-define-generator-asm-support - compare output before and after change
Change-Id: Ib95d79c5eba4a89b7ab04b6c62090b720ec7e9fe

cc/cc.go

@@ -179,6 +179,9 @@ type Flags struct {
 }
 
 type ObjectLinkerProperties struct {
+	// list of modules that should only provide headers for this module.
+	Header_libs []string `android:"arch_variant,variant_prepend"`
+
 	// names of other cc_object modules to link into this module using partial linking
 	Objs []string `android:"arch_variant"`
 
@@ -2083,6 +2086,7 @@ func DefaultsFactory(props ...interface{}) android.Module {
 		&VendorProperties{},
 		&BaseCompilerProperties{},
 		&BaseLinkerProperties{},
+		&ObjectLinkerProperties{},
 		&LibraryProperties{},
 		&FlagExporterProperties{},
 		&BinaryLinkerProperties{},

cc/object.go

@@ -66,6 +66,7 @@ func (object *objectLinker) linkerDeps(ctx DepsContext, deps Deps) Deps {
 		deps.LateSharedLibs = append(deps.LateSharedLibs, "libc")
 	}
 
+	deps.HeaderLibs = append(deps.HeaderLibs, object.Properties.Header_libs...)
 	deps.ObjFiles = append(deps.ObjFiles, object.Properties.Objs...)
 	return deps
 }