doc: replace mentions of 6g with gc or the go command
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5846070
diff --git a/doc/debugging_with_gdb.html b/doc/debugging_with_gdb.html
index 51b650b..84cc488 100644
--- a/doc/debugging_with_gdb.html
+++ b/doc/debugging_with_gdb.html
@@ -4,15 +4,15 @@
}-->
<p><i>
-This applies to the 6g toolchain. Gccgo has native gdb support. Besides this
-overview you might want to consult the
+This applies to the <code>gc</code> toolchain. Gccgo has native gdb support.
+Besides this overview you might want to consult the
<a href="http://sourceware.org/gdb/current/onlinedocs/gdb/">GDB manual</a>.
</i></p>
<h2 id="Introduction">Introduction</h2>
<p>
-When you compile and link your Go programs with the 6g/6l or 8g/8l toolchains
+When you compile and link your Go programs with the <code>gc</code> toolchain
on Linux, Mac OSX or FreeBSD, the resulting binaries contain DWARFv3
debugging information that recent versions (>7.1) of the GDB debugger can
use to inspect a live process or a core dump.
