llvm.inc: fix PACKAGES_DYNAMIC

* all dynamically created packages start with libllvm${LLVM_RELEASE}-
  libllvm${LLVM_RELEASE}-%s-dbg
  libllvm${LLVM_RELEASE}-%s
  libllvm${LLVM_RELEASE}-%s-staticdev

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>