Regenerate runtime_dependencies after installation

This ensures the we’re calculating we’ve run `fix_dynamic_linkage` so
that their results are consistent with what we’re actually pouring.

Combined with the linkage cache (which will be enabled by default in
future) this has very little performance overhead for consistently
Correct tab results.

As a result, don’t bother looking at opportunistically linked
dependencies when creating a tab by default but only do so after
installation has completed.

Finally, only output the caveats and summary after all these
operations have completed.

Library/Homebrew/formula_installer.rb

@@ -604,17 +604,19 @@ class FormulaInstaller
       post_install
     end
 
-    caveats
-
-    ohai "Summary" if verbose? || show_summary_heading?
-    puts summary
-
     # Updates the cache for a particular formula after doing an install
     CacheStoreDatabase.use(:linkage) do |db|
       break unless db.created?
       LinkageChecker.new(keg, formula, cache_db: db)
     end
 
+    # Update tab with actual runtime dependencies
+    tab = Tab.for_keg(keg)
+    Tab.clear_cache
+    tab.runtime_dependencies =
+      formula.runtime_dependencies(read_from_tab: false)
+    tab.write
+
     # let's reset Utils.git_available? if we just installed git
     Utils.clear_git_available_cache if formula.name == "git"
 
@@ -623,6 +625,11 @@ class FormulaInstaller
        !DevelopmentTools.curl_handles_most_https_certificates?
       ENV["HOMEBREW_CURL"] = formula.opt_bin/"curl"
     end
+
+    caveats
+
+    ohai "Summary" if verbose? || show_summary_heading?
+    puts summary
   ensure
     unlock
   end

Library/Homebrew/tab.rb

@@ -17,7 +17,7 @@ class Tab < OpenStruct
   # Instantiates a Tab for a new installation of a formula.
   def self.create(formula, compiler, stdlib)
     build = formula.build
-    runtime_deps = formula.runtime_dependencies(read_from_tab: false)
+    runtime_deps = formula.declared_runtime_dependencies
     attributes = {
       "homebrew_version" => HOMEBREW_VERSION,
       "used_options" => build.used_options.as_flags,