Disable gnulib test 'test-float' temporarily as it fails on ppc and ppc64le.

* gnulib-tests/gnulib.mk: Comment lines related to 'test-float'.
---
 gnulib-tests/gnulib.mk |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Index: gnulib-tests/gnulib.mk
===================================================================
--- gnulib-tests/gnulib.mk.orig
+++ gnulib-tests/gnulib.mk
@@ -635,9 +635,10 @@ EXTRA_DIST += test-filevercmp.c macros.h
 
 ## begin gnulib module float-tests
 
-TESTS += test-float
-check_PROGRAMS += test-float
-EXTRA_DIST += test-float.c macros.h
+# Test fails with GCC-10 on ppc and ppc64le.
+#TESTS += test-float
+#check_PROGRAMS += test-float
+#EXTRA_DIST += test-float.c macros.h
 
 ## end   gnulib module float-tests