cc/gcc: remove 'sub-level' version form symbols

Now we use defconfig files to store the samples, we have to be a bit more
conservatives in the symbols names, so as to avoid gigantic version bumps
when updating sub-level versions from a package.

For example (using fictitious versions):
- in crosstool-NG 1.17.0, we choose:
- latest gcc is gcc-linaro-4.7-2012.10, which is the default for the
choice in the menuconfig
- gcc-linaro-4.6-2012.10 is selected
- so, sample has an explicit symbol for the selected gcc version, as it
is not the default
- we update to crosstool-NG 1.18.0:
- latest gcc version is gcc-linaro-4.7-2013.01
- gcc-linaro-46 has been updated to gcc-linaro-4.6-2013.01
- as the sample now has no *valid* symbol to set the gcc version, the
default is used, while we would have expected to still use the 4.6
release from linaro, not the 4.7

Get rid of sub-level (ie. the third digit sequence in versions) from the
symbols for linaro versions.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

# Wrapper to build the companion tools facilities

# List all companion tools facilities, and parse their scripts

CT_COMP_TOOLS_FACILITY_LIST=

for f in "${CT_LIB_DIR}/scripts/build/companion_tools/"*.sh; do

    _f="$(basename "${f}" .sh)"

    _f="${_f#???-}"

    __f="CT_COMP_TOOLS_${_f}"

    if [ "${!__f}" = "y" ]; then

        CT_DoLog DEBUG "Enabling companion tools '${_f}'"

        . "${f}"

        CT_COMP_TOOLS_FACILITY_LIST="${CT_COMP_TOOLS_FACILITY_LIST} ${_f}"

    else

        CT_DoLog DEBUG "Disabling companion tools '${_f}'"

    fi

done

# Download the companion tools facilities

do_companion_tools_get() {

    for f in ${CT_COMP_TOOLS_FACILITY_LIST}; do

        do_companion_tools_${f}_get

    done

}

# Extract and patch the companion tools facilities

do_companion_tools_extract() {

    for f in ${CT_COMP_TOOLS_FACILITY_LIST}; do

        do_companion_tools_${f}_extract

    done

}

# Build the companion tools facilities

do_companion_tools() {

    for f in ${CT_COMP_TOOLS_FACILITY_LIST}; do

        do_companion_tools_${f}_build

    done

}