Updated release notes and added more info in source comments.

Author: vimanyu

cmake/binary_to_array.cmake

@@ -17,7 +17,12 @@
 #
 # Args:
 #   NAME: The name to use for the generated files.
-#   INPUT: The input binary to embed into the source file.
+#   INPUT: The input binary to embed into the source file. Please ensure that
+#          the input binary is uniquely named across all embedded resources used
+#          in the project. This is because the generated C++ source files strip
+#          out the directories which can cause conflicts when caching these
+#          embedded resources in the C++ layer (observed on Android API <= 21).
+#          See https://github.com/firebase/firebase-cpp-sdk/pull/289.
 #   CPP_NAMESPACE: The namespace to use in the generated files.
 #   OUTPUT_DIRECTORY: Where the generated files should be written to.
 function(binary_to_array NAME INPUT CPP_NAMESPACE OUTPUT_DIRECTORY)

release_build_files/readme.md

@@ -571,6 +571,12 @@ code.
 
 ## Release Notes
 
+### 7.1.1
+-   Changes
+    -   General (Android): Use non-conflicting file names for embedded resources
+        in Android builds. This fixes segfault crashes on old Android devices
+        (Android 5 and below).
+
 ### 7.1.0
 -   Changes
     -   General (iOS): Re-enabled Bitcode in iOS builds