issue:#I3QEMV, add version info

Signed-off-by: Nyangming_ha <yangming_ha@163.com>

BUILD.gn

@@ -12,6 +12,11 @@
 # limitations under the License.
 import("//build/lite/ndk/ndk.gni")
 
+# write version info.
+version_info = [ "VERSION=\"$ohos_version\"",
+                 "BUILD_TIME=\"$ohos_build_datetime\""]
+write_file("$root_build_dir/etc/version-info", version_info)
+
 group("ohos") {
   deps = []
   if (ohos_build_target == "") {

ohos_var.gni

@@ -13,6 +13,15 @@
 
 # Description: Define the global variables for all components
 declare_args() {
+  # OHOS version
+  name = "OpenHarmony"
+  major = "2"
+  minor = "2"
+  revision = "beta"
+  ohos_version = "$name $major.$minor $revision"
+  ohos_build_time = ""
+  ohos_build_datetime = ""
+
   product = ""
   device_path = ""
   product_path = ""
@@ -52,9 +61,6 @@ declare_args() {
 if (product_path != "") {
   product_config = read_file("${product_path}/config.json", "json")
 
-  # OHOS version
-  ohos_version = product_config.ohos_version
-
   # Board selected by product.
   board_name = product_config.board
   device_company = product_config.device_company
@@ -68,7 +74,6 @@ if (product_path != "") {
 }
 ohos_build_user = "jenkins"
 ohos_build_host = host_os
-ohos_build_time = exec_script("//build/lite/gn_scripts.py", [ "-t" ], "value")
 ohos_build_roothash = ""
 ohos_root_path = rebase_path("//")
 ohos_lite = true