Merge #6582 #6583

6582:  GeckoView update (nightly) (20200408-140746) r=psymoon a=MickeyMoz



6583:  GeckoView update (beta) (20200408-140804) r=Amejia481 a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

buildSrc/src/main/java/Gecko.kt

@@ -6,12 +6,12 @@ internal object GeckoVersions {
     /**
      * GeckoView Nightly Version.
      */
-    const val nightly_version = "77.0.20200407093520"
+    const val nightly_version = "77.0.20200408033650"
 
     /**
      * GeckoView Beta Version.
      */
-    const val beta_version = "76.0.20200406152003"
+    const val beta_version = "76.0.20200407205853"
 
     /**
      * GeckoView Release Version.