runtime: fix mkversion to output valid path separators

In a GOROOT path a backslash is a path separator
not an escape character. For example, `C:\go`.
Fixes gotest error:
version.go:3: unknown escape sequence: g

R=rsc
CC=golang-dev
https://golang.org/cl/4437076

diff --git a/src/pkg/runtime/mkversion.c b/src/pkg/runtime/mkversion.c
index 56afa1892ed003b4197c1895e80bd538f4f90993..0d96aa3569e0790aa5110ed4f6ab73de0eaf0389 100644 (file)
--- a/src/pkg/runtime/mkversion.c
+++ b/src/pkg/runtime/mkversion.c
@@ -4,7 +4,7 @@
 char *template =
        "// generated by mkversion.c; do not edit.\n"
        "package runtime\n"
-       "const defaultGoroot = \"%s\"\n"
+       "const defaultGoroot = `%s`\n"
        "const theVersion = \"%s\"\n";
 
 void