soong_config: Add TARGET_HAS_LEGACY_CAMERA_HAL1 variable

* Soong product variable 'has_legacy_camera_hal1'

Change-Id: I10800cba0c431297b5d7aad6e97d57a01232d73e
Signed-off-by: Adrian DC <radian.dc@gmail.com>
diff --git a/build/soong/android/variable.go b/build/soong/android/variable.go
index 4b905d9..cfa5c7d 100644
--- a/build/soong/android/variable.go
+++ b/build/soong/android/variable.go
@@ -1,5 +1,8 @@
 package android
 type Product_variables struct {
+	Has_legacy_camera_hal1 struct {
+		Cflags []string
+	}
 	Needs_text_relocations struct {
 		Cppflags []string
 	}
@@ -19,6 +22,7 @@
 }
 
 type ProductVariables struct {
+	Has_legacy_camera_hal1  *bool `json:",omitempty"`
 	Needs_text_relocations  *bool `json:",omitempty"`
 	Specific_camera_parameter_library  *string `json:",omitempty"`
 	Target_shim_libs  *string `json:",omitempty"`