cc: don't add linker arguments if only -v passed.

Supports configure scripts (e.g., mplayer) that use "gcc -v" to
identify compiler.

Closes Homebrew/homebrew#27793.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Library/ENV/4.3/cc

@@ -73,6 +73,12 @@ class Cmd
     end
   end
   def args
+    if @args.length == 1 and @args[0] == '-v'
+      # Don't add linker arguments if -v passed as sole option. This stops gcc
+      # -v with no other arguments from outputting a linker error. Some
+      # software uses gcc -v (wrongly) to sniff the GCC version.
+      return @args.dup
+    end
     if !cccfg?("O") || tool == "ld" || configure?
       args = @args.dup
     else