depends: Use more legible qmake commands in qt package

This change gets rid of multiple `../` that makes reasoning about the
script and its maintaining much easier.

Co-authored-by: fanquake <[email protected]>

Author: hebasto

depends/packages/qt.mk

@@ -260,11 +260,12 @@ define $(package)_config_cmds
   ./configure $($(package)_config_opts) && \
   echo "host_build: QT_CONFIG ~= s/system-zlib/zlib" >> mkspecs/qconfig.pri && \
   echo "CONFIG += force_bootstrap" >> mkspecs/qconfig.pri && \
-  $(MAKE) sub-src-clean && \
-  cd ../qttranslations && ../qtbase/bin/qmake qttranslations.pro -o Makefile && \
-  cd translations && ../../qtbase/bin/qmake translations.pro -o Makefile && cd ../.. && \
-  cd qttools/src/linguist/lrelease/ && ../../../../qtbase/bin/qmake lrelease.pro -o Makefile && \
-  cd ../lupdate/ && ../../../../qtbase/bin/qmake lupdate.pro -o Makefile && cd ../../../..
+  cd .. && \
+  $(MAKE) -C qtbase sub-src-clean && \
+  qtbase/bin/qmake -o qttranslations/Makefile qttranslations/qttranslations.pro && \
+  qtbase/bin/qmake -o qttranslations/translations/Makefile qttranslations/translations/translations.pro && \
+  qtbase/bin/qmake -o qttools/src/linguist/lrelease/Makefile qttools/src/linguist/lrelease/lrelease.pro && \
+  qtbase/bin/qmake -o qttools/src/linguist/lupdate/Makefile qttools/src/linguist/lupdate/lupdate.pro
 endef
 
 define $(package)_build_cmds