Undfined versioned symbols for SH target.

[kaz Kojima]

Hi,

I have undefined versioned symbols at making libc.so for
SH target. They are pthread_attr_init@@GLIBC_2.1 and
pthread_attr_init@GLIBC_2.0 defined in linuxthreads/weaks.c.
I can avoid them by adding a line
sh.*-.*-linux.*         libpthread=0            GLIBC_2.2
to the shlib-versions, but is this correct?

	kaz