Define powerpc64 lroundl compat symbol only once [committed]

[Joseph Myers]

sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c defines the
lroundl compat symbol, version GLIBC_2_1, twice, once based on llround
and once based on __lround.  Those are aliases for each other (llround
weak, __lround strong), but defining it twice does not make sense.
This patch changes it to define the compat symbol once only, matching
how libm_alias_double defines it.

Tested with build-many-glibcs.py for its powerpc64 configurations.  
Committed.

2017-12-01  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c
	[LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)] (lroundl): Do not define
	compat symbol based on llround.

diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c
index cb1a446..b6c70c2 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_llround.c
@@ -46,7 +46,6 @@ strong_alias (__llround, __llroundl)
 #endif
 #if LONG_DOUBLE_COMPAT(libm, GLIBC_2_1)
 compat_symbol (libm, __llround, llroundl, GLIBC_2_1);
-compat_symbol (libm, llround, lroundl, GLIBC_2_1);
 #endif
 
 /* long has the same width as long long on PPC64.  */

-- 
Joseph S. Myers
joseph@codesourcery.com