circleci: skip compiling packages not enabled

E.g. some packages are target, or arch specific, skip compiling them if
they cannot be enabled for current sdk.  This should reduce false
positives for packages like docker-ce etc.

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>

.circleci/config.yml

@@ -148,7 +148,16 @@ jobs:
                  echo_green "=> Package check OK"
              done
 
+             make \
+                 -f .config \
+                 -f tmp/.packagedeps \
+                 -f <(echo '$(info $(sort $(package-y) $(package-m)))'; echo -en 'a:\n\t@:') \
+              | tr ' ' '\n' >enabled-package-subdirs.txt
              for PKG in $PKGS ; do
+                 if ! grep -m1 -qE "(^|/)$PKG$" enabled-package-subdirs.txt; then
+                        echo_red "===+ Building: $PKG skipped. It cannot be enabled with $SDK_FILE"
+                        continue
+                 fi
                  echo_blue "===+ Building: $PKG"
                  make "package/$PKG/compile" -j3 V=s || {
                         RET=$?