[WK2] [GTK] WebKit2 testing bot fails to run tests due to missing files

[WK2] [GTK] WebKit2 testing bot fails to run tests due to missing files
https://bugs.webkit.org/show_bug.cgi?id=90061

Reviewed by Gustavo Noronha Silva.

Add "-no-install -no-fast-install" to the LDFLAGS in bots. With
this flag libtool tells the linker to set the rpath for the output
file to the full path of the .libs directory, instead of using a
wrapper script to set up the LD_LIBRARY_PATH. This will allow us
to directly reuse builds in the pure testing bots.

* BuildSlaveSupport/gtk/daemontools-buildbot.conf:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@121345 268f45cc-cd09-0410-ab3c-d52691b4dbfc