configure: use upstream's fix for SPARC epoll_create1 test
Drop our patch fixing the epoll_create1 configure test; it is obsoleted
by a slightly different one upstream.
diff --git a/configure b/configure
index 3ee01a9..94906e3 100755
--- a/configure
+++ b/configure
@@ -2329,12 +2329,7 @@
return 0;
}
EOF
-# We need to build this with -Werror to handle a bug in some
-# SPARC glibc where the function is defined but not declared
-# in the header file. Without -Werror gcc warns about an implicit
-# declaration of the function but the link succeeds; however
-# qemu itself will fail to build if it is compiled -Werror.
-if compile_prog "$ARCH_CFLAGS -Werror" "" ; then
+if compile_prog "$ARCH_CFLAGS" "" ; then
epoll_create1=yes
fi