functions: avoid CR when progress bar is not enabled

Using CT-NG with progress bar disabled, still prints CR ('\r') characters
on the output. When you capture the output to a file as part of an
automated build, it shows extra empty lines.

For example:

------------------------------------------------------------
[INFO ] Performing some trivial sanity checks

[INFO ] Build started 20110404.113619

[INFO ] Building environment variables

[EXTRA] Preparing working directories

[EXTRA] Installing user-supplied crosstool-NG configuration
------------------------------------------------------------

Signed-off-by: Javier Viguera <javier.viguera@digi.com>
(transplanted from cbd07f3dd6e3689a6b971e999aa82d09fb94d515)

# Build script for libtool

CT_LIBTOOL_VERSION=2.2.6b

do_companion_tools_libtool_get() {

    CT_GetFile "libtool-${CT_LIBTOOL_VERSION}" \

               {ftp,http}://ftp.gnu.org/gnu/libtool

}

do_companion_tools_libtool_extract() {

    CT_Extract "libtool-${CT_LIBTOOL_VERSION}"

    CT_Patch "libtool" "${CT_LIBTOOL_VERSION}"

}

do_companion_tools_libtool_build() {

    CT_DoStep EXTRA "Installing libtool"

    mkdir -p "${CT_BUILD_DIR}/build-libtool"

    CT_Pushd "${CT_BUILD_DIR}/build-libtool"

    CT_DoExecLog CFG \

    "${CT_SRC_DIR}/libtool-${CT_LIBTOOL_VERSION}/configure" \

        --prefix="${CT_TOOLS_OVERIDE_DIR}"

    CT_DoExecLog ALL make

    CT_DoExecLog ALL make install

    CT_Popd

    CT_EndStep

}