hostapd: Enable support of 80211AC

Enable compilation of 80211AC support. This will let us toggle feature
using the config variable at runtime.

Bug: 34669770
Test: Compiles
Test: Will send for regression tests to ensure there is no regression.
Change-Id: I0aee9748426fe5156970280669300f7d1967b658
diff --git a/hostapd/android.config b/hostapd/android.config
index c3dbdfc..5a24438 100644
--- a/hostapd/android.config
+++ b/hostapd/android.config
@@ -134,6 +134,9 @@
 # IEEE 802.11n (High Throughput) support
 CONFIG_IEEE80211N=y
 
+# IEEE 802.11ac (Very High Throughput) support
+CONFIG_IEEE80211AC=y
+
 # Remove debugging code that is printing out debug messages to stdout.
 # This can be used to reduce the size of the hostapd considerably if debugging
 # code is not needed.