Fix liblangtag and GLib checks for iOS and Android

Change-Id: If6b46ebdb63d7688830f5ee712c124c07e93661b

configure.in

@@ -11273,7 +11273,7 @@ AC_SUBST(SYSTEM_GLIB)
 
 if test "$SYSTEM_GLIB" = "YES"; then
     PKG_CHECK_MODULES( GLIB, glib-2.0 )
-else
+elif test $_os != iOS -a $_os != Android; then
     BUILD_TYPE="$BUILD_TYPE GLIB"
 fi
 AC_SUBST(GLIB_CFLAGS)
@@ -11285,7 +11285,7 @@ dnl ===================================================================
 ENABLE_LIBLANGTAG=
 SYSTEM_LIBLANGTAG=
 AC_MSG_CHECKING([whether to use liblangtag])
-if test "$enable_liblangtag" = "yes" -o \( "$enable_liblangtag" = "" -a "$CROSS_COMPILING" != "YES" \); then
+if test "$enable_liblangtag" = "yes" -o \( "$enable_liblangtag" = "" -a $_os != Android -a $_os != iOS \); then
     ENABLE_LIBLANGTAG=YES
     AC_MSG_RESULT([yes])
     AC_MSG_CHECKING([whether to use system liblangtag])