runtime: fix 386, arm build

CL 68150047 lost runtime.panicdivide.

TBR=dfc
CC=golang-codereviews
https://golang.org/cl/68610043

diff --git a/src/pkg/runtime/panic.c b/src/pkg/runtime/panic.c
index f4f2148d54f9e55dd5839a9bf124300c119bc431..6e5be3e67751abc658bba31643f4faac5aeb8ca5 100644 (file)
--- a/src/pkg/runtime/panic.c
+++ b/src/pkg/runtime/panic.c
@@ -487,3 +487,9 @@ runtime·Goexit(void)
        rundefer();
        runtime·goexit();
 }
+
+void
+runtime·panicdivide(void)
+{
+       runtime·panicstring("integer divide by zero");
+}