Fix makefile typo.

Change-Id: I4f610396af2d31792d9b9e452abd8ac597eb1aee
Reviewed-on: https://swiftshader-review.googlesource.com/4011
Reviewed-by: Greg Hartman <ghartman@google.com>
Tested-by: Greg Hartman <ghartman@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
1 file changed