depends: fix qt determinism

Qt's configure grabs the path to xkb's data root during configure, but the
build changes in 5.8 apparently broke the handling for cross builds. As a
result, the string embedded in the binary depends on whether or not some files
are present in the builder's filesystem.

The "-xkb-config-root" configure setting is intended to allow manual overriding
but it is also broken. See: https://bugreports.qt.io/browse/QTBUG-60005

This has since been fixed upstream, so just hard-code the path for now. We can
drop this patch when we bump to a fixed Qt.

Also, fix the "-qt-xkbcommon-x11" config param which was renamed. This does not
appear to affect build results, presumably because auto-detection is working,
but it does not hurt to be explicit.

depends/packages/qt.mk

@@ -8,7 +8,7 @@ $(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)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch fix_riscv64_arch.patch
+$(package)_patches=fix_qt_pkgconfig.patch mac-qmake.conf fix_configure_mac.patch fix_no_printer.patch fix_rcc_determinism.patch fix_riscv64_arch.patch xkb-default.patch
 
 $(package)_qttranslations_file_name=qttranslations-$($(package)_suffix)
 $(package)_qttranslations_sha256_hash=9822084f8e2d2939ba39f4af4c0c2320e45d5996762a9423f833055607604ed8
@@ -83,7 +83,7 @@ $(package)_config_opts_darwin += -device-option MAC_TARGET=$(host)
 $(package)_config_opts_darwin += -device-option MAC_LD64_VERSION=$(LD64_VERSION)
 endif
 
-$(package)_config_opts_linux  = -qt-xkbcommon
+$(package)_config_opts_linux  = -qt-xkbcommon-x11
 $(package)_config_opts_linux += -qt-xcb
 $(package)_config_opts_linux += -system-freetype
 $(package)_config_opts_linux += -no-feature-sessionmanager
@@ -137,6 +137,7 @@ define $(package)_preprocess_cmds
   patch -p1 -i $($(package)_patch_dir)/fix_configure_mac.patch &&\
   patch -p1 -i $($(package)_patch_dir)/fix_no_printer.patch &&\
   patch -p1 -i $($(package)_patch_dir)/fix_rcc_determinism.patch &&\
+  patch -p1 -i $($(package)_patch_dir)/xkb-default.patch &&\
   echo "!host_build: QMAKE_CFLAGS     += $($(package)_cflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_CXXFLAGS   += $($(package)_cxxflags) $($(package)_cppflags)" >> qtbase/mkspecs/common/gcc-base.conf && \
   echo "!host_build: QMAKE_LFLAGS     += $($(package)_ldflags)" >> qtbase/mkspecs/common/gcc-base.conf && \