Removed quotes around the command to run in echo_run(), because this was causing

the build to fail in the second stage on Tru64 4.0F. It seems like bjam tried to
build the target " " or something like that.


[SVN r29925]

tools/build

@@ -1 +1 @@
-Subproject commit 1a97191fe708b0eeb10003939365a5ddfb42c78e
+Subproject commit 79a2641febe01ec9f05428fd7a4fb28caca8f05f