use sane line breaks

Makefile.in

@@ -116,7 +116,8 @@ install_headers:
 	rm -f tar_exclude
 	printf '#ifndef _LIBC_INTERNAL_H\n#define _LIBC_INTERNAL_H 1\n#endif\n' > \
 		$(PREFIX)$(DEVEL_PREFIX)include/libc-internal.h
-	echo '/* Dont use _syscall#() macros; use the syscall() function */' > $(PREFIX)$(DEVEL_PREFIX)include/bits/syscalls.h
+	echo '/* Dont use _syscall#() macros; use the syscall() function */' > \
+		$(PREFIX)$(DEVEL_PREFIX)include/bits/syscalls.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/dl-osinfo.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/_lfs_64.h
 	$(RM) $(PREFIX)$(DEVEL_PREFIX)include/bits/uClibc_uintmaxtostr.h