Fix bad install names in executables

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/libspotify.rb

@@ -12,13 +12,10 @@ class Libspotify < Formula
     doc.install %w(ChangeLog README LICENSE licenses.xhtml examples)
     man3.install Dir['man3/*']
 
-    cd lib
-    ln_s "libspotify.12.1.51.dylib", "libspotify.dylib"
-    ln_s "libspotify.12.1.51.dylib", "libspotify.12.dylib"
-
-    system "install_name_tool", "-id",
-           "#{HOMEBREW_PREFIX}/lib/libspotify.12.1.51.dylib",
-           "libspotify.dylib"
+    lib.cd do
+      ln_s "libspotify.12.1.51.dylib", "libspotify.dylib"
+      ln_s "libspotify.12.1.51.dylib", "libspotify.12.dylib"
+    end
 
     (lib+'pkgconfig/libspotify.pc').write pc_content
   end

Formula/notmuch.rb

@@ -13,7 +13,5 @@ class Notmuch < Formula
     # requires a newer emacs than OS X provides, so disable the bindings
     system "./configure", "--prefix=#{prefix}", "--without-emacs"
     system "make install"
-    system "install_name_tool", "-change", "libnotmuch.2.dylib",
-                                "#{lib}/libnotmuch.2.dylib", "#{bin}/notmuch"
   end
 end

Formula/v8.rb

@@ -25,7 +25,5 @@ class V8 < Formula
     prefix.install 'include'
     lib.install 'libv8.dylib'
     bin.install 'shell' => 'v8'
-
-    system "install_name_tool", "-change", "libv8.dylib", "#{lib}/libv8.dylib", "#{bin}/v8"
   end
 end