kde: kf6-pty — disable UTEMPTER + fix botched __redox__ #ifdef balance

- FindUTEMPTER aborts when cross-compiling unless told what to do; Redox has no
  utmp/wtmp login-record DB, so pass -DCMAKE_DISABLE_FIND_PACKAGE_UTEMPTER=ON
  (PTYs work without it; utempter only feeds who/w login accounting).
- kpty.cpp's __redox__ no-op guard around KPty::login()/logout() had dropped the
  #endif for the UTEMPTER_PATH and HAVE_LOGIN blocks and never closed the new
  __redox__ #ifdef, leaving both functions 3 #if deep at their closing brace
  (unterminated #else / expected '}'). Add the 3 missing #endif to each.

local/recipes/kde/kf6-pty/recipe.toml

@@ -47,6 +47,7 @@ cmake "${COOKBOOK_SOURCE}" \
     -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_PREFIX_PATH="${COOKBOOK_SYSROOT}" \
     -DBUILD_TESTING=OFF \
+    -DCMAKE_DISABLE_FIND_PACKAGE_UTEMPTER=ON \
     -DBUILD_QCH=OFF \
     -DHAVE_PTSNAME=TRUE \
     -DHAVE_GRANTPT=TRUE \

local/recipes/kde/kf6-pty/source/src/kpty.cpp

@@ -540,6 +540,9 @@ void KPty::login(const char *user, const char *remotehost)
     endutent();
     updwtmp(_PATH_WTMP, &l_struct);
 #endif
+#endif // HAVE_LOGIN
+#endif // UTEMPTER_PATH
+#endif // __redox__
 }
 
 void KPty::logout()
@@ -621,6 +624,9 @@ void KPty::logout()
     }
     endutent();
 #endif
+#endif // HAVE_LOGIN
+#endif // UTEMPTER_PATH
+#endif // __redox__
 }
 
 bool KPty::tcGetAttr(struct ::termios *ttmode) const