Revert enabling -Werror lustre-build.m4 is used by all branches and not just

HEAD.

build/autoconf/lustre-build.m4

@@ -599,11 +599,6 @@ if test $target_cpu == "powerpc64"; then
 	CC="$CC -m64"
 fi
 
-/* Enable -Werror */
-if test $target_cpu == "i686" -o $target_cpu == "x86_64"; then
-	CFLAGS="$CFLAGS -Werror"
-fi
-
 CPPFLAGS="-I\$(top_builddir)/$LIBCFS_INCLUDE_DIR -I\$(top_srcdir)/$LIBCFS_INCLUDE_DIR-I\$(top_builddir)/lnet/include -I\$(top_srcdir)/lnet/include -I\$(top_builddir)/lustre/include -I\$(top_srcdir)/lustre/include $CPPFLAGS"
 
 LLCPPFLAGS="-D__arch_lib__ -D_LARGEFILE64_SOURCE=1"