switch to old repo for system_core 10 branch

omni-aosp.xml

@@ -94,7 +94,7 @@
 
   <project path="system/bpf" name="android_system_bpf" remote="omnirom" revision="android-10" /> -->
   <project path="system/bt" name="android_system_bt" remote="omnirom" revision="android-10" />
-  <project path="system/core" name="android_system_core" remote="omnirom" revision="android-10" />
+  <project path="system/core" name="android_system_core_old" remote="omnirom" revision="android-10" />
   <project path="system/extras" name="android_system_extras" remote="omnirom" revision="android-10" />
   <project path="system/libhidl" name="android_system_libhidl" remote="omnirom" revision="android-10" />
   <project path="system/media" name="android_system_media" remote="omnirom" revision="android-10" />

twrp-extras.xml

@@ -13,7 +13,7 @@
     <project path="bootable/recovery" name="android_bootable_recovery" remote="TeamWin" revision="android-10.0" />
 
 <!-- Use TeamWin repos for full recovery compatibility -->
-    <remove-project name="android_system_core"/>
+    <remove-project name="android_system_core_old"/>
     <project path="system/core" name="android_system_core" remote="TeamWin" revision="android-10.0" />
 
     <remove-project name="android_vendor_omni"/>