Add support for Solaris, fixing HPPA.
* configure.ac (HAVE_GCC_ATTRIBUTE_ALIGNED): Remove. (LIB_SCHED_YIELD): New. Check sched_yield in -lrt. * src/gen-posix-lock-obj.c (USE_16BYTE_ALIGNMENT): Remove. (USE_DOUBLE_FOR_ALIGNMENT, USE_LONG_DOUBLE_FOR_ALIGNMENT): New. * src/syscfg/lock-obj-pub.hppa-unknown-linux-gnu.h: Update.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>