multiple deployers: Ignore .debug files

This commit replicates a pattern from the TextToSpeechPluginsDeployer
into the BasicPluginsDeployer - to affect all standard deployers.

Essentially - it's extremely unlikely that composing an AppImage
with debug symbols is what a user actually wants to do. I'm also
not aware of a good story for connecting debug symbols to an AppImage
at all.

As a result, let's make a sensible choice - and not package them.
Trust that developers will use their underlying build system for Debug,
and that release tracking will allow developers to tie an AppImage
back to a source control revision.

Finally, note that this works around an interesting aarch64 bug -
where the .debug files that are created are marked as x86_64 ELF
binaries - even when you are _building on an aarch64 host_.

src/deployers/BasicPluginsDeployer.cpp

@@ -39,6 +39,10 @@ bool BasicPluginsDeployer::deployStandardQtPlugins(const std::vector<std::string
     for (const auto &pluginName : plugins) {
         ldLog() << "Deploying Qt" << pluginName << "plugins" << std::endl;
         for (fs::directory_iterator i(qtPluginsPath / pluginName); i != fs::directory_iterator(); ++i) {
+            if (i->path().extension() == ".debug") {
+                ldLog() << LD_DEBUG << "skipping .debug file:" << i->path() << std::endl;
+                continue;
+            }
             // add a trailing slash, so pluginName is used as a destination directory, not a file.
             if (!appDir.deployLibrary(*i, appDir.path() / "usr/plugins" / pluginName / ""))
                 return false;

src/deployment.h

@@ -37,6 +37,10 @@ inline bool deployIntegrationPlugins(appdir::AppDir& appDir, const fs::path& qtP
             // otherwise, when the directory doesn't exist, it might just copy all files to files called like
             // destinationDir
             auto destinationDir = appDir.path() / "usr/plugins" / subDir / "";
+            if (i->path().extension() == ".debug") {
+                ldLog() << LD_DEBUG << "skipping .debug file:" << i->path() << std::endl;
+                continue;
+            }
 
             if (!appDir.deployLibrary(*i, destinationDir))
                 return false;