EXCLUDE_PKGS: fix bugs

skip in install, will skip when marked for installation/inclusion
skip in build, will skip when dependency.

This is a bit icky as I think you could assume in catch22 situation,
Where something is marked to be skipped, but something else (marked for
installtion) depends on it. However the main reason for EXCLUDE_PKGS atm
is to exclude emulators in BASE DEVICES (RK-ARMV8-A) that shall be
device optimized for actual devices. Later we probably want to have
package flags that signal device optimization. EXCLUDE_PKGS is probably
to be marked as a power-user feature to be used at your own risk.

scripts/build

@@ -10,6 +10,12 @@ if [ -z "${1}" ]; then
   die "usage: ${0} package_name[:<host|target|init|bootstrap>] [parent_pkg]"
 fi
 
+# Skip excluded packages
+listcontains "${EXCLUDE_PKGS}" "${PKG_NAME}" && {
+    echo "Skipping ${PKG_NAME} it's listed in EXCLUDE_PKGS"
+    exit 0
+}
+
 if [ "${1}" = "--all" ]; then
   if [ -n "${2}" ]; then
     for build_dir in $(ls -1d ${ROOT}/build.*); do
@@ -23,12 +29,6 @@ if [ -z "${PKG_NAME}" ]; then
   die "$(print_color CLR_ERROR "${1}: no package.mk file found")"
 fi
 
-# Skip excluded packages
-listcontains "${EXCLUDE_PKGS}" "${PKG_NAME}" && {
-    echo "Skipping ${PKG_NAME} it's listed in EXCLUDE_PKGS"
-    exit 0
-}
-
 if [ -n "${PKG_ARCH}" ]; then
   listcontains "${PKG_ARCH}" "!${TARGET_ARCH}" && exit 0
   listcontains "${PKG_ARCH}" "${TARGET_ARCH}" || listcontains "${PKG_ARCH}" "any" || exit 0

scripts/install

@@ -11,6 +11,12 @@ if [ -z "${1}" ]; then
   die "usage: ${0} package_name [parent_pkg]"
 fi
 
+# Skip excluded packages
+listcontains "${EXCLUDE_PKGS}" "${PKG_NAME}" && {
+    echo "Skipping ${PKG_NAME} it's listed in EXCLUDE_PKGS"
+    exit 0
+}
+
 if [ -z "${PKG_NAME}" ]; then
   die "$(print_color CLR_ERROR "${1}: no package.mk file found")"
 fi