Compatibility fixes:

grep: support -z
find: support --mindepth
  together +45 bytes
cpio: support -p (configurable, +230 bytes)
libbb: tweaks for cpio

diff --git a/scripts/defconfig b/scripts/defconfig
index 6bf1a4a..166989b 100644
--- a/scripts/defconfig
+++ b/scripts/defconfig
@@ -112,6 +112,7 @@
 CONFIG_BZIP2=y
 CONFIG_CPIO=y
 CONFIG_FEATURE_CPIO_O=y
+CONFIG_FEATURE_CPIO_P=y
 # CONFIG_DPKG is not set
 # CONFIG_DPKG_DEB is not set
 # CONFIG_FEATURE_DPKG_DEB_EXTRACT_ONLY is not set