automake: install Python packages to canonical paths

Ref: https://trac.macports.org/ticket/57329

devel/automake/Portfile

@@ -10,6 +10,7 @@ name                automake
 # from the older version of automake.
 # cf: ${prefix}/share/libtool/aclocal.m4
 version             1.16.1
+revision            1
 
 categories          devel
 platforms           darwin freebsd
@@ -33,7 +34,8 @@ master_sites        gnu
 checksums           rmd160  3bada190697e5683d5a0353e1a39bfc24e883061 \
                     sha256  608a97523f97db32f1f5d5615c98ca69326ced2054c9f82e65bade7fc4c9dea8
 
-patchfiles          test-glibtool.patch
+patchfiles          test-glibtool.patch \
+                    patch-issue57329.diff
 
 # It should be safe to use the system Perl, since Automake only uses
 # core modules. The configure script recommends 5.8.2 or later, and

devel/automake/files/patch-issue57329.diff

@@ -0,0 +1,30 @@
+diff --git m4/python.m4 m4/python.m4
+index 63c0a0e04..f81684378 100644
+--- m4/python.m4
++++ m4/python.m4
+@@ -147,10 +147,10 @@ except ImportError:
+      am_cv_python_pythondir=`$PYTHON -c "
+ $am_python_setup_sysconfig
+ if can_use_sysconfig:
+-    sitedir = sysconfig.get_path('purelib', vars={'base':'$am_py_prefix'})
++    sitedir = sysconfig.get_path('purelib')
+ else:
+     from distutils import sysconfig
+-    sitedir = sysconfig.get_python_lib(0, 0, prefix='$am_py_prefix')
++    sitedir = sysconfig.get_python_lib(0, 0)
+ sys.stdout.write(sitedir)"`
+      case $am_cv_python_pythondir in
+      $am_py_prefix*)
+@@ -189,10 +189,10 @@ sys.stdout.write(sitedir)"`
+      am_cv_python_pyexecdir=`$PYTHON -c "
+ $am_python_setup_sysconfig
+ if can_use_sysconfig:
+-    sitedir = sysconfig.get_path('platlib', vars={'platbase':'$am_py_prefix'})
++    sitedir = sysconfig.get_path('platlib')
+ else:
+     from distutils import sysconfig
+-    sitedir = sysconfig.get_python_lib(1, 0, prefix='$am_py_prefix')
++    sitedir = sysconfig.get_python_lib(1, 0)
+ sys.stdout.write(sitedir)"`
+      case $am_cv_python_pyexecdir in
+      $am_py_exec_prefix*)