Merge branch 'ndk-r16b' into 'master'

makebuildserver: upgrade NDK r16 to r16b

See merge request fdroid/fdroidserver!458

diff --combined makebuildserver
index 80b794dc908540d3ecc249f5be87dc23c407e7c3,e6d30eb13b6117695e858386f7c8afa3ea7c8196..2fd51b18271a20f5f05803739acd0a3cd71cf8a7
--- 1/makebuildserver
--- 2/makebuildserver
+++ b/makebuildserver
@@@ -349,8 -349,6 +349,8 @@@ cachefiles = 
       'e7cf7d1853dfc30c1c44f571d3919eeeedef002823b66b6a988d27e919686389'),
      ('https://downloads.gradle.org/distributions/gradle-4.5-bin.zip',
       '03f2a43a314ff0fb843a85ef68078e06d181c4549c1e5fb983f289382b59b5e3'),
 +    ('https://downloads.gradle.org/distributions/gradle-4.5.1-bin.zip',
 +     '3e2ea0d8b96605b7c528768f646e0975bd9822f06df1f04a64fd279b1a17805e'),
      ('https://dl.google.com/android/ndk/android-ndk-r10e-linux-x86_64.bin',
       '102d6723f67ff1384330d12c45854315d6452d6510286f4e5891e00a5a8f1d5a'),
      ('https://dl.google.com/android/ndk/android-ndk-r9b-linux-x86_64.tar.bz2',
@@@ -367,8 -365,8 +367,8 @@@
       '0ecc2017802924cf81fffc0f51d342e3e69de6343da892ac9fa1cd79bc106024'),
      ('https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip',
       'f01788946733bf6294a36727b99366a18369904eb068a599dde8cca2c1d2ba3c'),
-     ('https://dl.google.com/android/repository/android-ndk-r16-linux-x86_64.zip',
-      'a8550b81771c67cc6ab7b479a6918d29aa78de3482901762b4f9e0132cd9672e'),
+     ('https://dl.google.com/android/repository/android-ndk-r16b-linux-x86_64.zip',
+      'bcdea4f5353773b2ffa85b5a9a2ae35544ce88ec5b507301d8cf6a76b765d901'),
  ]