angle: Correct pre/postInstall phase hooks

pkgs/by-name/an/angle/package.nix

···
   '';
 
   installPhase = ''
-    runHook preInstallPhase
+    runHook preInstall
 
     install -v -m755 -D \
       *${stdenv.hostPlatform.extensions.sharedLibrary}* \
···
     Cflags: -I''${includedir}
     EOF
 
-    runHook postInstallPhase
+    runHook postInstall
   '';
 
   meta = {