Update Mirakel to 2.7-beta1 (64), see #205

metadata/de.azapps.mirakelandroid.txt

@@ -155,6 +155,20 @@ Build:2.6.2,63
         cp build/*.gradle . && \
         rm -r appcompat/bin
 
+Build:2.7-beta1,64
+    commit=v2.7-beta1
+    subdir=main
+    gradle=FdroidNormal
+    prebuild=cd ../ && \
+        cp build/*.gradle . && \
+        rm -r appcompat/bin
+
+Maintainer Notes:
+Keep 2 release versions in the archive, so don't build more than
+4 beta versions!
+.
+
+Archive Policy:6 versions
 Auto Update Mode:Version v%v
 Update Check Mode:Tags ^v[0-9.]*$
 Current Version:2.6.2