log/syslog: correct asm name for C function

Patch from Rainer Orth.

Change-Id: Ie93e0a4f003fa14e7236fd3d952afb37af3caeaa
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/272259
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
diff --git a/libgo/go/log/syslog/syslog_c.c b/libgo/go/log/syslog/syslog_c.c
index 329df40..acfee6e 100644
--- a/libgo/go/log/syslog/syslog_c.c
+++ b/libgo/go/log/syslog/syslog_c.c
@@ -12,7 +12,7 @@
    can't represent a C varargs function in Go.  */
 
 void syslog_c(intgo, const char*)
-  __asm__ (GOSYM_PREFIX "log_1syslog.syslog_c");
+  __asm__ (GOSYM_PREFIX "log_1syslog.syslog__c");
 
 void
 syslog_c (intgo priority, const char *msg)