Try to build _ctypes on x86 openbsd.
diff --git a/Modules/_ctypes/libffi/configure b/Modules/_ctypes/libffi/configure
index 0991b63..c1e5cd4 100755
--- a/Modules/_ctypes/libffi/configure
+++ b/Modules/_ctypes/libffi/configure
@@ -3490,6 +3490,7 @@
i*86-*-beos*) TARGET=X86; TARGETDIR=x86;;
i*86-*-freebsd* | i*86-*-kfreebsd*-gnu) TARGET=X86; TARGETDIR=x86;;
i*86-*-netbsdelf* | i*86-*-knetbsd*-gnu) TARGET=X86; TARGETDIR=x86;;
+i*86-*-openbsd*) TARGET=X86; TARGETDIR=x86;;
i*86-*-rtems*) TARGET=X86; TARGETDIR=x86;;
i*86-*-win32*) TARGET=X86_WIN32; TARGETDIR=x86;;
i*86-*-cygwin*) TARGET=X86_WIN32; TARGETDIR=x86;;
diff --git a/Modules/_ctypes/libffi/configure.ac b/Modules/_ctypes/libffi/configure.ac
index 76bf16e..c7f05d6 100644
--- a/Modules/_ctypes/libffi/configure.ac
+++ b/Modules/_ctypes/libffi/configure.ac
@@ -28,6 +28,7 @@
i*86-*-beos*) TARGET=X86; TARGETDIR=x86;;
i*86-*-freebsd* | i*86-*-kfreebsd*-gnu) TARGET=X86; TARGETDIR=x86;;
i*86-*-netbsdelf* | i*86-*-knetbsd*-gnu) TARGET=X86; TARGETDIR=x86;;
+i*86-*-openbsd*) TARGET=X86; TARGETDIR=x86;;
i*86-*-rtems*) TARGET=X86; TARGETDIR=x86;;
i*86-*-win32*) TARGET=X86_WIN32; TARGETDIR=x86;;
i*86-*-cygwin*) TARGET=X86_WIN32; TARGETDIR=x86;;