Make sure Apache modules are found.

--- libsoup-3.6.1/get_apache_modules_dirs.py.orig
+++ libsoup-3.6.1/get_apache_modules_dirs.py
@@ -101,8 +101,8 @@
     apache_mod_unixd_module_file = ''
     apache_http2_module_dir = ''
 
-    for lib_dir in ['lib', 'lib64']:
-        for httpd_dir in ['apache', 'apache2', 'http', 'http2', 'httpd']:
+    for lib_dir in ['lib', 'lib64', 'libexec']:
+        for httpd_dir in ['apache', 'apache2', 'http', 'http2', 'httpd', '']:
             for mpm_suffix in ['', '-' + mpm]:
                 for modules_dir in ['', 'modules']:
                     modules_path = os.path.join(apache_prefix, lib_dir, httpd_dir + mpm_suffix, modules_dir)