Make Qmake copy licenses instead of OS scripts

Described in commit 97e203fd89e7cb54c7ce96ce779b2e8cb6ac1374

Linux was not including any license files by mistake.

advancedSettings.pro

@@ -45,7 +45,7 @@ include($$include_dir/sources.pri)
 include($$include_dir/resources.pri)
 
 # Copy extra files
-COPIES += resCopy readmeCopy
+COPIES += resCopy readmeCopy licenseCopy
 COPY_DEST_DIR = $$OUT_PWD/$$DESTDIR
 
 resCopy.files = src/res/*
@@ -53,3 +53,8 @@ resCopy.path = $$COPY_DEST_DIR/res
 
 readmeCopy.files = Readme.md
 readmeCopy.path = $$COPY_DEST_DIR
+
+licenseCopy.files = LICENSE \
+                    third-party/openvr/LICENSE-VALVE  \
+                    third-party/easylogging++/LICENSE-MIT
+licenseCopy.path = $$COPY_DEST_DIR

build_scripts/win/build.py

@@ -119,11 +119,6 @@ def deploy():
 
     say("Copying necessary files:")
 
-    #license
-    copy_file(get_project_dir() + "\\LICENSE", get_deploy_dir() + "\\LICENSE-GPL.txt")
-    copy_file(get_project_dir() + "\\third-party\\openvr\\LICENSE", get_deploy_dir() + "\\LICENSE-VALVE.txt")
-    copy_file(get_project_dir() + "\\third-party\\easylogging++\\LICENSE", get_deploy_dir() + "\\LICENSE-MIT.txt")
-
     #package files
     copy_folder(get_project_dir() + "\\src\\package_files", get_deploy_dir())