alpha/hppa: fix libc.abilist sorting wrt fmemopen

Commit fdb7d390 introduced the fmemopen symbol at the wrong location
in alpha/libc.abilist and hppa/libc.abilist. The file needs to keep
sorted, fix that.

Note: this is for 2.22 only, for master the format has been changed in
commit 8c77b6ad.

	* sysdeps/unix/sysv/linux/alpha/libc.abilist [GLIBC_2.22]: Move
	to keep the file sorted.
	* sysdeps/unix/sysv/linux/hppa/libc.abilist [GLIBC_2.22]: Likewise.