Update i386 architecture GNU cpu regex in cputable to match i786 too

cputable

@@ -14,7 +14,7 @@
 # Column 5 is the endianness (byte ordering in numbers)
 #
 # <Debian name>	<GNU name>	<config.guess regex>	<Bits>	<Endianness>
-i386		i586		(i[3456]86|pentium)	32	little
+i386		i586		(i[34567]86|pentium)	32	little
 ia64		ia64		ia64			64	little
 alpha		alpha		alpha.*			64	little
 amd64		x86_64		x86_64			64	little

debian/changelog

@@ -70,6 +70,7 @@ dpkg (1.17.11) UNRELEASED; urgency=low
     snowflake and use a GNU triplet not matching its baseline. This will
     cause problems when cross-building and using unmatched combinations of
     dpkg-dev and gcc. Closes: #751363
+  * Update i386 architecture GNU cpu regex in cputable to match i786 too.
 
   [ Updated programs translations ]
   * Danish (Joe Dalton). Closes: #754127