Enforce build order with qa system

The QA objects link to the direct kiface objects, which creates a second
dependency on the generated lexer files.  To ensure that the primary
apps are finished building them in a (potentially) different thread, we
set a false dependency on the final build product in the qa CMake.

Fixes: lp:1833851
* https://bugs.launchpad.net/kicad/+bug/1833851

(cherry picked from commit 172542cfc4)

qa/eeschema/CMakeLists.txt

@@ -46,6 +46,11 @@ add_executable( qa_eeschema
     test_eagle_plugin.cpp
 )
 
+# Anytime we link to the kiface_objects, we have to add a dependency on the last object
+# to ensure that the generated lexer files are finished being used before the qa runs in a
+# multi-threaded build
+add_dependencies( qa_eeschema eeschema )
+
 target_link_libraries( qa_eeschema
     eeschema_kiface
     common

qa/pcbnew/CMakeLists.txt

@@ -54,6 +54,11 @@ add_executable( qa_pcbnew
     $<TARGET_OBJECTS:pcbnew_kiface_objects>
 )
 
+# Anytime we link to the kiface_objects, we have to add a dependency on the last object
+# to ensure that the generated lexer files are finished being used before the qa runs in a
+# multi-threaded build
+add_dependencies( qa_pcbnew pcbnew )
+
 target_link_libraries( qa_pcbnew
     qa_pcbnew_utils
     3d-viewer

qa/pcbnew_tools/CMakeLists.txt

@@ -42,6 +42,11 @@ add_executable( qa_pcbnew_tools
     $<TARGET_OBJECTS:pcbnew_kiface_objects>
 )
 
+# Anytime we link to the kiface_objects, we have to add a dependency on the last object
+# to ensure that the generated lexer files are finished being used before the qa runs in a
+# multi-threaded build
+add_dependencies( qa_pcbnew_tools pcbnew )
+
 target_link_libraries( qa_pcbnew_tools
     qa_pcbnew_utils
     3d-viewer