build: Update FluxC ref

Author: dcalhoun

build.gradle

@@ -26,7 +26,7 @@ ext {
     automatticTracksVersion = '5.1.0'
     gutenbergMobileVersion = 'v1.121.0-alpha1'
     wordPressAztecVersion = 'v2.1.3'
-    wordPressFluxCVersion = 'trunk-79f2bc35285748c715e00f2a6648ed6831632178'
+    wordPressFluxCVersion = '3045-5fc175e4780dec098cfd04bf5eb9da7f3cce4076'
     wordPressLoginVersion = '1.16.0'
     wordPressPersistentEditTextVersion = '1.0.2'
     wordPressUtilsVersion = '3.14.0'