Put headers behind #if HAVE_FEATURE_BREAKPAD

that are needed for the #if HAVE_FEATURE_BREAKPAD case

so that IWYU does not give incorrect warnings
in --disable-breakpad builds

Change-Id: I05a71ac57fc53e02b293e47a56e92f993afd0592
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/191909
Tested-by: Jenkins
Reviewed-by: Gabor Kelemen <gabor.kelemen.extern@allotropia.de>

include/desktop/crashreport.hxx

@@ -10,13 +10,14 @@
 #ifndef INCLUDED_DESKTOP_CRASHREPORT_HXX
 #define INCLUDED_DESKTOP_CRASHREPORT_HXX
 
-#include <desktop/dllapi.h>
 
 #include <rtl/ustring.hxx>
-#include <osl/mutex.hxx>
 
 #include <config_features.h>
 
+#if HAVE_FEATURE_BREAKPAD
+#include <desktop/dllapi.h>
+#include <osl/mutex.hxx>
 // vector not sort the entries
 #include <memory>
 #include <vector>
@@ -27,6 +28,7 @@ namespace google_breakpad
 {
 class ExceptionHandler;
 }
+#endif
 
 /**
  * Provides access to the crash reporter service.