Adding freshly minted abuild keys to the CBUILDROOT

When bootstrapping we need to have access to the freshly
minted abuild keys in the CBUILDROOT. While this can
potentially be done as a separate step it doesn't really
hurt to include it in the bootstrap.sh script.

Signed-off-by: Roman Shaposhnik <rvs@zededa.com>

scripts/bootstrap.sh

@@ -60,7 +60,7 @@ fi
 if [ ! -d "$CBUILDROOT" ]; then
 	msg "Creating sysroot in $CBUILDROOT"
 	mkdir -p "$CBUILDROOT/etc/apk/keys"
-	cp -a /etc/apk/keys/* "$CBUILDROOT/etc/apk/keys"
+	cp -a /etc/apk/keys/* ~/.abuild/*.pub "$CBUILDROOT/etc/apk/keys"
 	${SUDO_APK} add --quiet --initdb --arch $TARGET_ARCH --root $CBUILDROOT
 fi