mesa-demos: Specify the lib dir properly.

Use STAGING_EXECPREFIXDIR to specify the location of glut
header files and libs rather than STAGING_LIBDIR.

Also revert the previous unneeded change to glut.patch.

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
gdb: add PACKAGECONFIG for babeltrace

Add PACKAGECONFIG for 'babeltrace' so that we don't have the implicit
dependency which might lead to problems when building images.

As an example of showing what problem we might have without this patch,
see the following steps which would lead to a failure.
1. IMAGE_INSTALL_append = " gdb"
2. bitbake babeltrace
3. bitbake gdb
4. bitbake babeltrace -ccleansstate
5. bitbake core-image-minimal

The rootfs process would fail with the following error message.
error: Can't install gdb-7.7-r0@i586: no package provides babeltrace >= 1.2.1+git0+66c2a20b43

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
qemu: define PACKAGECONFIG[] for ssh2

qemu configure will search for libssh2 if we do not enable or
disable it's use, resulting in non-deterministic builds.  We
define PACKAGECONFIG[] to avoid this.

Signed-off-by: Joe Slater <jslater@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>