Merge ~santoshbit2007/oxide:systemInfo_buildfix into oxide:master

[Santosh]

Cross Compiling oxide after installing qtsystem5-dev fails due to cmake error.
This is similar issue to QtConfigExtra looking for arm version of moc where host version of moc is needed.

// error -->

CMake Error at /usr/lib/arm-linux-gnueabihf/cmake/Qt5DBus/Qt5DBusConfig.cmake:27 (message):
  The imported target "Qt5::DBus" references the file

     "/usr/lib/arm-linux-gnueabihf/qt5/bin/qdbuscpp2xml"

  but this file does not exist. Possible reasons include:

  * The file was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and contained

     "/usr/lib/arm-linux-gnueabihf/cmake/Qt5DBus/Qt5DBusConfigExtras.cmake"

  but not all the files it references.

Call Stack (most recent call first):
  /usr/lib/arm-linux-gnueabihf/cmake/Qt5DBus/Qt5DBusConfigExtras.cmake:6 (_qt5_DBus_check_file_exists)
  /usr/lib/arm-linux-gnueabihf/cmake/Qt5DBus/Qt5DBusConfig.cmake:158 (include)
  /usr/lib/arm-linux-gnueabihf/cmake/Qt5SystemInfo/Qt5SystemInfoConfig.cmake:100 (find_package)
  oxide/build/cmake/ChromiumBuildShim.cmake:271 (find_package)

[Chris Coulson (chrisccoulson)]

Thanks for this - I've approved it with 1 minor comment.

review: Approve

diff --git a/build/cmake/qt/ProjectInit.cmake b/build/cmake/qt/ProjectInit.cmake
index 7431792..aebd2f8 100644
--- a/build/cmake/qt/ProjectInit.cmake
+++ b/build/cmake/qt/ProjectInit.cmake
@@ -32,6 +32,16 @@ if(CMAKE_CROSSCOMPILING)
     add_executable(Qt5::uic IMPORTED)
   endif()
 
+  # Dummy targets to restrict Qt5DBusConfigExtras.cmake looking for
+  # qdbuscpp2xml and qdbusxml2cpp when cross-compiling
+  if(NOT TARGET Qt5::qdbuscpp2xml)
+    add_executable(Qt5::qdbuscpp2xml IMPORTED)
+  endif()
+  if(NOT TARGET Qt5::qdbusxml2cpp)
+    add_executable(Qt5::qdbusxml2cpp IMPORTED)
+  endif()
+
+
   # QT_MOC_EXECUTABLE is set by Qt5CoreConfigExtras, but it sets it to
   # the target executable rather than the host executable, which is no
   # use for cross-compiling. For cross-compiling, we have a guess and