message: Add QtConcurrent to depends.
diff: @@ -7,7 +7,7 @@ $(package)_sha256_hash=eed620cb268b199bd83b3fc6a471c51d51e1dc2dbb5374fc97a0cc75f
  $(package)_dependencies=openssl zlib
  $(package)_linux_dependencies=freetype fontconfig libxcb libX11 xproto libXext
  $(package)_build_subdir=qtbase
  -$(package)_qt_libs=corelib network widgets gui plugins testlib
  +$(package)_qt_libs=corelib network widgets gui plugins testlib concurrent
  $(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch xkb-default.patch
  $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
  @@ -70,7 +70,7 @@ $(package)_config_opts += -silent
  $(package)_config_opts += -v
  $(package)_config_opts += -no-feature-printer
  $(package)_config_opts += -no-feature-printdialog
  -$(package)_config_opts += -no-feature-concurrent
  +$(package)_config_opts += -feature-concurrent
  $(package)_config_opts += -no-feature-xml
  ifneq ($(build_os),darwin)
  