Merge #14184: Scripts and tools: increased timeout downloading

e7a7245 Scripts and tools: increased timeout downloading (Emanuele Cisbani)

Pull request description:

  DOWNLOAD_CONNECT_TIMEOUT changed from 10 to 30 because some file start only after 15 sec (see below).
  ```
  Fetching boost_1_64_0.tar.bz2 from https://dl.bintray.com/boostorg/release/1.64.0/source/
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
    0     0    0     0    0     0      0      0 --:--:--  0:00:15 --:--:--     0
  100 76.7M  100 76.7M    0     0  1863k      0  0:00:42  0:00:42 --:--:-- 8136k
  /home/gitianuser/bitcoin/depends/work/download/boost-1_64_0/boost_1_64_0.tar.bz2.temp: OK
  ```

Tree-SHA512: 43250df818eacedeed5fa3cc8453ecedbf564776fa1c6124e872f46d123423f8bdf174a47389dce7d6cc6b96791953b1bb2f96ce3df6c156415f0c3de2d5cc76

Author: laanwj

depends/Makefile

@@ -15,7 +15,7 @@ HOST ?= $(BUILD)
 PATCHES_PATH = $(BASEDIR)/patches
 BASEDIR = $(CURDIR)
 HASH_LENGTH:=11
-DOWNLOAD_CONNECT_TIMEOUT:=10
+DOWNLOAD_CONNECT_TIMEOUT:=30
 DOWNLOAD_RETRIES:=3
 HOST_ID_SALT ?= salt
 BUILD_ID_SALT ?= salt