llvm: install all tools, make keg-only.

Closes Homebrew/homebrew#24263.

Formula/llvm.rb

@@ -28,6 +28,8 @@ class Llvm < Formula
 
   env :std if build.universal?
 
+  keg_only :provided_by_osx
+
   def install
     if python and build.include? 'disable-shared'
       raise 'The Python bindings need the shared library.'
@@ -70,12 +72,6 @@ class Llvm < Formula
       python.site_packages.install buildpath/'bindings/python/llvm'
       python.site_packages.install buildpath/'tools/clang/bindings/python/clang' if build.with? 'clang'
     end
-
-    # Remove all binaries except llvm-config
-    rm_f Dir["#{bin}/*"] - Dir["#{bin}/llvm-config"]
-
-    # Remove all man pages
-    man.rmtree if build.with? 'clang'
   end
 
   def test
@@ -86,13 +82,6 @@ class Llvm < Formula
     s = ''
     s += python.standard_caveats if python
     s += <<-EOS.undent
-      This formula only provide library components of LLVM. To use full
-      featured LLVM please try the llvm* formulae in homebrew-versions tap,
-      for instance:
-
-          brew tap homebrew/versions
-          brew install llvm33
-
       Extra tools are installed in #{share}/llvm and #{share}/clang.
 
       If you already have LLVM installed, then "brew upgrade llvm" might not work.