do not sort contexts in TS files

this avoids big diffs if contexts are renamed and manually adjusted in
the files.

share/qtcreator/translations/translations.pro

@@ -9,7 +9,7 @@ defineReplace(prependAll) {
 }
 
 XMLPATTERNS = $$targetPath($$[QT_INSTALL_BINS]/xmlpatterns)
-LUPDATE = $$targetPath($$[QT_INSTALL_BINS]/lupdate) -locations relative -no-ui-lines
+LUPDATE = $$targetPath($$[QT_INSTALL_BINS]/lupdate) -locations relative -no-ui-lines -no-sort
 LRELEASE = $$targetPath($$[QT_INSTALL_BINS]/lrelease)
 
 TRANSLATIONS = $$prependAll(LANGUAGES, $$PWD/qtcreator_,.ts)