Release candidate build breaks on Android with "error: hidden symbol 'arc4random_buf' is not defined locally"
23:03.28 /var/tmp/dist/android-toolchain/android-ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: hidden symbol 'arc4random_buf' is not defined locally
23:03.28 /var/tmp/dist/android-toolchain/android-ndk/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/lib/gcc/arm-linux-androideabi/4.9.x/../../../../arm-linux-androideabi/bin/ld: error: hidden symbol 'arc4random_buf' is not defined locally
23:03.28 clang++: error: linker command failed with exit code 1 (use -v to see invocation)
23:03.28 /var/tmp/build/firefox-6dde994c6580/config/rules.mk:707: recipe for target 'libxul.so' failed
23:03.28 make[4]: *** [libxul.so] Error 1