scripts: fix binutils-version.sh

The current binutils-version.sh expects the version string at the end
of the first line.  It turned out to not work with Linaro toolchain:
It has "Linaro 2014.09" at the back.

To fix this issue, let's parse the word right after the close
parenthesis.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reported-by: York Sun <yorksun@freescale.com>
Acked-by: Dirk Behme <dirk.behme@gmail.com>

scripts/binutils-version.sh

@@ -14,7 +14,9 @@ if [ ${#gas} -eq 0 ]; then
 	exit 1
 fi
 
-MAJOR=$($gas --version | head -1 | awk '{print $NF}' | cut -d . -f 1)
-MINOR=$($gas --version | head -1 | awk '{print $NF}' | cut -d . -f 2)
+version_string=$($gas --version | head -1 | sed -e 's/.*) *\([0-9.]*\).*/\1/' )
+
+MAJOR=$(echo $version_string | cut -d . -f 1)
+MINOR=$(echo $version_string | cut -d . -f 2)
 
 printf "%02d%02d\\n" $MAJOR $MINOR