toolchain-shar-extract.sh: Preserve ICECC_PATH

ICECC_PATH wasn't being preserved in the environment when it was
reinitialized. This prevented toolchain installs from being able to use
icecream by setting ICECC_PATH when icecc isn't in $PATH

(From OE-Core rev: c245ab9bee536c7b6af026a5eda02ae0695567b3)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/files/toolchain-shar-extract.sh

@@ -3,6 +3,7 @@
 [ -z "$ENVCLEANED" ] && exec /usr/bin/env -i ENVCLEANED=1 HOME="$HOME" \
 	LC_ALL=en_US.UTF-8 \
 	TERM=$TERM \
+	ICECC_PATH="$ICECC_PATH" \
 	http_proxy="$http_proxy" https_proxy="$https_proxy" ftp_proxy="$ftp_proxy" \
 	no_proxy="$no_proxy" all_proxy="$all_proxy" GIT_PROXY_COMMAND="$GIT_PROXY_COMMAND" "$0" "$@"
 [ -f /etc/environment ] && . /etc/environment