UBUNTU: [debian] Fix regression with ABI subversions and backport

UBUNTU: [debian] Fix regression with ABI subversions and backport

Tim pointed out that 443b5814ee77f8c9083079ce0e6a0806e087630f broke the parsing
of backport versions, such as 8.13~14.10+ppa.1. This should fix it. I used the
following script to validate the regular expressions:

dannf@fluid:~$ cat test.sh

set -e

splitver() {
    local ver="$1"
    local abinum="$(echo $ver | sed -r -e 's/([^\+~]*)\.[^\.]+(~.*)?(\+.*)?$/\1/')"
    local uploadnum="$(echo $ver | sed -r -e 's/[^\+~]*\.([^\.~]+)(~.*)?(\+.*)?$/\1/')"

    echo "$abinum $uploadnum"
}

do_test() {
    local ver="$1"
    local expected="$2"

    local actual="$(splitver $ver)"

    if [ "$actual" = "$expected" ]; then
	echo "PASS: $ver"
	return 0
    fi
    echo "FAIL: $ver split as $actual"
    return 1
}

do_test "33.58" "33 58"
do_test "33.59.58" "33.59 58"
do_test "8.13~14.10" "8 13"
do_test "8.13~14.10+ppa.1" "8 13"
do_test "8.13.99~14.10+ppa.3" "8.13 99"
dannf@fluid:~$ ./test.sh
PASS: 33.58
PASS: 33.59.58
PASS: 8.13~14.10
PASS: 8.13~14.10+ppa.1
PASS: 8.13.99~14.10+ppa.3

Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>