- Remove unneeded emacs-nox dependency.

- BuildIgnore emacs and vim to avoid cycles.

- Split out llvm and lldb into a version-specific package.
- Turn this package into a wrapper around the version-specific
packages.
- Remove patches:
* default-to-i586.patch
* assume-opensuse.patch
* glibc-2.23-libcxx.patch
* arm_suse_support.diff
* llvm-remove-clang-only-flags.patch
* clang-resourcedirs.patch
* lldb-add-pthread-dl-libs.patch
* llvm-nonvoid-return.patch
* glibc-2.24-libcxx.patch
* revert-cmake-soname.patch
* set-revision.patch
* lldb-cmake.patch
* D15067.id41365.diff
* llvm-fix-find-gcc5-install.patch