Add x32 support to ostable, abitable and triplettable

Closes: #667037

abitable

@@ -7,3 +7,4 @@
 # Column 2 is the size (in bits) of the ABI integers/pointers.
 #
 # <Debian name>	<Bits>
+gnux32		32

debian/changelog

@@ -28,6 +28,7 @@ dpkg (1.16.3) UNRELEASED; urgency=low
   * Ignore the minor format version number for deb-split format, unifying
     the behaviour with the deb format.
   * Add support for an abitable containing arch attribute overrides.
+  * Add x32 support to abitable, ostable and triplettable. Closes: #667037
 
   [ Helge Kreutzmann ]
   * Fix a typo in man/dpkg-buildflags.1.

ostable

@@ -19,6 +19,7 @@ uclibc-linux		linux-uclibc		linux[^-]*-uclibc
 gnueabihf-linux		linux-gnueabihf		linux[^-]*-gnueabihf
 gnueabi-linux		linux-gnueabi		linux[^-]*-gnueabi
 gnuspe-linux		linux-gnuspe		linux[^-]*-gnuspe
+gnux32-linux		linux-gnux32		linux[^-]*-gnux32
 gnulp-linux		linux-gnulp		linux[^-]*-gnulp
 gnu-linux		linux-gnu		linux[^-]*(-gnu.*)?
 gnu-kfreebsd		kfreebsd-gnu		kfreebsd[^-]*(-gnu.*)?

triplettable

@@ -8,6 +8,7 @@ uclibc-linux-<cpu>	uclibc-linux-<cpu>
 gnueabihf-linux-arm	armhf
 gnueabi-linux-arm	armel
 gnuspe-linux-powerpc	powerpcspe
+gnux32-linux-amd64	x32
 gnulp-linux-i386	lpia
 gnu-linux-<cpu>		<cpu>
 gnu-kfreebsd-<cpu>	kfreebsd-<cpu>