*printf fix - ' flag

[Eric Blake]

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POSIX requires %'d to print a decimal separated by the thousands
separator.  Fortunately for newlib, the thousands separator in the C
locale is the empty string.  I also discovered that my previous patch to
support %zu and friends was incomplete, since it didn't support %1$zu.

2006-11-14  Eric Blake  <ebb9@byu.net>

	* libc/stdio/vfprintf.c (_vfprintf_r): Support ' flag.
	(chclass): ' is a flag.  j, t, and z are modifiers.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9@byu.net
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