Consistent --host and --build arguments to configure

ports/samba/build.sh

Index: ports/samba/build.sh
diff --git a/ports/samba/build.sh b/ports/samba/build.sh
index 840ef7c14d04222c3805fe31850ca893cd04c15d..b7275eac4e5a147fcf11fb31d6131ad2003c15aa 100755
--- a/ports/samba/build.sh
+++ b/ports/samba/build.sh
@@ -9,20 +9,8 @@ BUILD_DIR=${SRC_DIR}
 EnableGlibcCompat
 
 ConfigureStep() {
-  conf_build=$(/bin/sh "${SCRIPT_DIR}/config.guess")
-
   SetupCrossEnvironment
 
-  local CONFIGURE=${NACL_CONFIGURE_PATH:-${SRC_DIR}/configure}
-  local conf_host=${NACL_CROSS_PREFIX}
-  if [ "${NACL_ARCH}" = "pnacl" -o "${NACL_ARCH}" = "emscripten" ]; then
-    # The PNaCl tools use "pnacl-" as the prefix, but config.sub
-    # does not know about "pnacl".  It only knows about "le32-nacl".
-    # Unfortunately, most of the config.subs here are so old that
-    # it doesn't know about that "le32" either.  So we just say "nacl".
-    conf_host="nacl"
-  fi
-
   # Inject a shim that speed up pnacl invocations for configure.
   if [ "${NACL_ARCH}" = "pnacl" ]; then
     local PNACL_CONF_SHIM="${TOOLS_DIR}/pnacl-configure-shim.py"
@@ -36,8 +24,8 @@ ConfigureStep() {
   # For example a trivial PNaCl binary can sometimes run on the linux host if
   # it has the correct LLVM bimfmt support. What is more, autoconf will
   # generate a warning if only --host is specified.
-  LogExecute "${CONFIGURE}" \
-    --build=${conf_build} \
+  LogExecute "${SRC_DIR}/configure" \
+    --build=${CONF_BUILD} \
     --hostcc=gcc \
     --cross-compile \
     --cross-answers=${START_DIR}/answers \