[Tizen] Update base_repo and unified_repo of generate_sysroot script (f…

…lutter-tizen#364)

* Update base_repo and unified_repo url

* Code format

ci/tizen/generate_sysroot.py

@@ -41,10 +41,12 @@ def generate_sysroot(sysroot: Path, api_version: float, arch: str, quiet=False):
   else:
     sys.exit('Unknown arch: ' + arch)
 
-  base_repo = 'http://download.tizen.org/snapshots/tizen/{}-base/latest/repos/standard/packages'.format(
-    api_version)
-  unified_repo = 'http://download.tizen.org/snapshots/tizen/{}-unified/latest/repos/standard/packages'.format(
-    api_version)
+  base_repo = 'http://download.tizen.org/snapshots/TIZEN/Tizen-{}/Tizen-{}-Base/latest/repos/standard/packages'.format(
+      api_version, api_version
+  )
+  unified_repo = 'http://download.tizen.org/snapshots/TIZEN/Tizen-{}/Tizen-{}-Unified/latest/repos/standard/packages'.format(
+      api_version, api_version
+  )
 
   # Retrieve html documents.
   documents = {}