Avoid quoting OpenCL include path when it's not required to

src/backend.c

@@ -9392,22 +9392,23 @@ int backend_session_begin (hashcat_ctx_t *hashcat_ctx)
 
     char *build_options_buf = (char *) hcmalloc (build_options_sz);
 
-    int build_options_len = 0;
+    int build_options_len = snprintf (build_options_buf, build_options_sz, "-D KERNEL_STATIC ");
 
     if ((device_param->is_cuda == true) || (device_param->is_hip == true))
     {
       // using a path with a space will break nvrtc_make_options_array_from_string()
       // we add it to options array in a clean way later
-
-      build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, "-D KERNEL_STATIC ");
     }
     else
     {
       // when is builded with cygwin and msys, cpath_real doesn't work
+
       #if defined (_WIN) || defined (__CYGWIN__) || defined (__MSYS__)
-      build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, "-D KERNEL_STATIC -D INCLUDE_PATH=%s ", "OpenCL");
+      build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, "-D INCLUDE_PATH=%s ", "OpenCL");
       #else
-      build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, "-D KERNEL_STATIC -D INCLUDE_PATH=\"%s\" ", folder_config->cpath_real);
+      const char *build_options_include_fmt = (strchr (folder_config->cpath_real, ' ') != NULL) ? "-D INCLUDE_PATH=\"%s\" " : "-D INCLUDE_PATH=%s ";
+
+      build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, build_options_include_fmt, folder_config->cpath_real);
       #endif
 
       build_options_len += snprintf (build_options_buf + build_options_len, build_options_sz - build_options_len, "-D XM2S(x)=#x ");