mesa3d: properly propagate the dependencies of BR2_PACKAGE_LLVM

mesa3d: properly propagate the dependencies of BR2_PACKAGE_LLVM

We cannot simply select BR2_PACKAGE_LLVM, we need to take into account
all its dependencies. BR2_PACKAGE_LLVM_ARCH_SUPPORTS was already taken
into account, but not the other dependencies.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Acked-by: Valentin Korenblit <valentin.korenblit@smile.fr>
Signed-off-by: Thomas Petazzoni <a class="moz-txt-link-rfc2396E" href="mailto:thomas.petazzoni@bootlin.com">&lt;thomas.petazzoni@bootlin.com&gt;</a></pre>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>