nptl i686: fix pthread_cond_wait.S compilation

nptl i686: fix pthread_cond_wait.S compilation

__i686 is a gcc-defined macro, so i686 build failed with:
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S: Assembler messages:
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:572: Error: junk at end of line, first unrecognized character is `1'
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:573: Error: junk at end of line, first unrecognized character is `1'
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:574: Error: junk at end of line, first unrecognized character is `1'
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:575: Error: junk at end of line, first unrecognized character is `.'
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:576: Error: junk at end of line, first unrecognized character is `1'
libpthread/nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:579: Error: expected comma after name `' in .size directive

Signed-off-by: Roman I Khimov <khimov@altell.ru>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>