tools: Plumb in capture control

Add control of capturing output into u_boot_pylib and the tools which
use it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/binman/main.py b/tools/binman/main.py
index 326f5c9..fa5ad79 100755
--- a/tools/binman/main.py
+++ b/tools/binman/main.py
@@ -77,8 +77,8 @@
     # Run the entry tests first ,since these need to be the first to import the
     # 'entry' module.
     result = test_util.run_test_suites(
-        'binman', debug, verbosity, test_preserve_dirs, processes, test_name,
-        toolpath,
+        'binman', debug, verbosity, False, test_preserve_dirs, processes,
+        test_name, toolpath,
         [bintool_test.TestBintool, entry_test.TestEntry, ftest.TestFunctional,
          fdt_test.TestFdt, elf_test.TestElf, image_test.TestImage,
          cbfs_util_test.TestCbfs, fip_util_test.TestFip])