XFAIL catan and catanh tests on ibm128

Mark 4 catan and catanh tests as xfail-rounding:ibm128-libgcc.
After this patch all catan and catanh tests pass on ibm128.

Regenerated auto-libm-test-out using gmp 6.1.2, mpfr 3.1.5 and upstream
mpc (9ef8030e50),

Tested on powerpc, powerpc64 and powerpc64le.

	* math/auto-libm-test-in: Mark some catan and catanh as
	xfail-rounding:ibm128-libgcc.
	* math/auto-libm-test-out-catan: Regenerate.
	* math/auto-libm-test-out-catanh: Likewise.

ChangeLog

@@ -1,3 +1,10 @@
+2017-03-16  Tulio Magno Quites Machado Filho  <tuliom@linux.vnet.ibm.com>
+
+	* math/auto-libm-test-in: Mark some catan and catanh as
+	xfail-rounding:ibm128-libgcc.
+	* math/auto-libm-test-out-catan: Regenerate.
+	* math/auto-libm-test-out-catanh: Likewise.
+
 2017-03-16  Joseph Myers  <joseph@codesourcery.com>
 
 	* misc/sys/cdefs.h (__BEGIN_NAMESPACE_STD): Remove macro.

math/auto-libm-test-in

@@ -3020,10 +3020,10 @@ catan 0.0 0x1.fp16383
 catan -0.0 0x1.fp16383
 catan 0.0 -0x1.fp16383
 catan -0.0 -0x1.fp16383
-catan 0x1.fp16383 0x1.fp16383
-catan 0x1.fp16383 -0x1.fp16383
-catan -0x1.fp16383 0x1.fp16383
-catan -0x1.fp16383 -0x1.fp16383
+catan 0x1.fp16383 0x1.fp16383 xfail-rounding:ibm128-libgcc
+catan 0x1.fp16383 -0x1.fp16383 xfail-rounding:ibm128-libgcc
+catan -0x1.fp16383 0x1.fp16383 xfail-rounding:ibm128-libgcc
+catan -0x1.fp16383 -0x1.fp16383 xfail-rounding:ibm128-libgcc
 catan 0x1p-13 1.0
 catan 0x1p-13 -1.0
 catan -0x1p-13 1.0
@@ -3438,10 +3438,10 @@ catanh 0.0 0x1.fp16383
 catanh -0.0 0x1.fp16383
 catanh 0.0 -0x1.fp16383
 catanh -0.0 -0x1.fp16383
-catanh 0x1.fp16383 0x1.fp16383
-catanh 0x1.fp16383 -0x1.fp16383
-catanh -0x1.fp16383 0x1.fp16383
-catanh -0x1.fp16383 -0x1.fp16383
+catanh 0x1.fp16383 0x1.fp16383 xfail-rounding:ibm128-libgcc
+catanh 0x1.fp16383 -0x1.fp16383 xfail-rounding:ibm128-libgcc
+catanh -0x1.fp16383 0x1.fp16383 xfail-rounding:ibm128-libgcc
+catanh -0x1.fp16383 -0x1.fp16383 xfail-rounding:ibm128-libgcc
 catanh 0x1p-13 1.0
 catanh 0x1p-13 -1.0
 catanh -0x1p-13 1.0