Squashed 'external/toxcore/c-toxcore/' changes from da438763d5b..671b1f92332

671b1f92332 fix: toxav rtp temp buffer allocation size was too large and cast from 32bit to 16bit, causing a overflow and making the allocated size too small
258148bd4e1 chore(ci): new minimum for all android versions is 21
d369c93c489 chore: Fix Emscripten build failing with no host specified
51b24d1c239 chore: Run CompCert on the stable branch of libsodium
cab1f7d522b chore: Update WineHQ's apt key hash
102a1fa9b82 chore: Fix -Werror=maybe-uninitialized in a test
cc9515da9c7 chore: Fix cpplint failing to install
3485b5feef3 chore: Disable -Wswitch-default and -Wunsafe-buffer-usage
719041e04b6 chore: Fix Circle CI failing on a missing clang lib
5344d7f84d0 fix: Memory leak in the bootstrap daemon
fa201681e18 cleanup: Remove useless if clause
7572888a218 chore: Fix GitHub actions deprecation warnings

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 671b1f92332a8314dccf76d5df93c0b6c1230636

.github/scripts/cmake-android

@@ -10,7 +10,7 @@ ABI=${1:-"armeabi-v7a"}
 case $ABI in
   armeabi-v7a)
     TARGET=armv7a-linux-androideabi
-    NDK_API=19
+    NDK_API=21
     ;;
   arm64-v8a)
     TARGET=aarch64-linux-android
@@ -18,7 +18,7 @@ case $ABI in
     ;;
   x86)
     TARGET=i686-linux-android
-    NDK_API=19
+    NDK_API=21
     ;;
   x86_64)
     TARGET=x86_64-linux-android