Fix paths to removal/update helpers

Author: TheAssassin

src/shared/CMakeLists.txt

@@ -2,6 +2,7 @@ add_library(shared STATIC shared.h shared.cpp)
 target_link_libraries(shared PUBLIC PkgConfig::glib Qt5::Core Qt5::Widgets Qt5::DBus xdg-basedir libappimage translationmanager trashbin)
 target_compile_definitions(shared
     PRIVATE -DCMAKE_INSTALL_PREFIX="${CMAKE_INSTALL_PREFIX}"
+    PRIVATE -DCMAKE_INSTALL_LIBDIR="${CMAKE_INSTALL_LIBDIR}"
     PRIVATE -DCMAKE_PROJECT_SOURCE_DIR="${PROJECT_SOURCE_DIR}"
 )
 target_include_directories(shared PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})

src/shared/shared.cpp

@@ -408,7 +408,7 @@ bool installDesktopFileAndIcons(const QString& pathToAppImage, bool resolveColli
         g_key_file_set_string(desktopFile.get(), removeSectionName, "Name", "Remove AppImage from system");
 
         std::ostringstream removeExecPath;
-        removeExecPath << CMAKE_INSTALL_PREFIX << "/lib/appimagelauncher/remove " << pathToAppImage.toStdString();
+        removeExecPath << CMAKE_INSTALL_PREFIX << "/" << CMAKE_INSTALL_LIBDIR << "/appimagelauncher/remove " << pathToAppImage.toStdString();
         g_key_file_set_string(desktopFile.get(), removeSectionName, "Exec", removeExecPath.str().c_str());
 
         // install translations
@@ -427,7 +427,7 @@ bool installDesktopFileAndIcons(const QString& pathToAppImage, bool resolveColli
         g_key_file_set_string(desktopFile.get(), updateSectionName, "Name", "Update AppImage");
 
         std::ostringstream updateExecPath;
-        updateExecPath << CMAKE_INSTALL_PREFIX << "/lib/appimagelauncher/update " << pathToAppImage.toStdString();
+        updateExecPath << CMAKE_INSTALL_PREFIX << "/" << CMAKE_INSTALL_LIBDIR << "/appimagelauncher/update " << pathToAppImage.toStdString();
         g_key_file_set_string(desktopFile.get(), updateSectionName, "Exec", updateExecPath.str().c_str());
 
         // install translations