Adds wheel hashes for both Stretch and Buster

(cherry picked from commit 85fad2c)

build-requirements.txt

@@ -4,12 +4,12 @@ certifi==2018.10.15 --hash=sha256:a5471c55b011bd45d6155f5c3629310c1d2f1e1a5a899b
 chardet==3.0.4 --hash=sha256:9f178988ca4c86e8a319b51aac1185b6fe5192328eb5a163c286f4bf50b7b3d8
 idna==2.7 --hash=sha256:954e65e127d0433a352981f43f291a438423d5b385ebf643c70fd740e0634111
 mako==1.0.7 --hash=sha256:87ee3f74ba3ea544e683a5a22e7e34f4d1cf3ad34414b5f3858becf00facf1d6
-markupsafe==1.0 --hash=sha256:6a7078a2fb4406458d6ae3579e4eb01a9bdc0a9a0686a28fa50c19a039e3fcb8
+markupsafe==1.0 --hash=sha256:6a7078a2fb4406458d6ae3579e4eb01a9bdc0a9a0686a28fa50c19a039e3fcb8 --hash=sha256:3c9bf8fb4c3cf7dd11fd465132156d4c3cddb926d39bdbd0f0bf5920fd8009a4
 pathlib2==2.3.2 --hash=sha256:8e276e2bf50a9a06c36e20f03b050e59b63dfe0678e37164333deb87af03b6ad
 python-dateutil==2.7.5 --hash=sha256:56f285e7fad54cde3e31dc68a31a861543bfee5ada9278da8e85ec20a8f72912
 python-editor==1.0.3 --hash=sha256:44fc57a6db6e04c7922c37a04d0a86d0024a4f0f06245b6c57638cb322176202
 requests==2.20.0 --hash=sha256:2a539dd6af40a611f3b8eb3f99d3567781352ece1698b2fab42bf4c2218705b5
 securedrop-sdk==0.0.11 --hash=sha256:1f4013d5a2d970efe28cc76ee2ebce25bc0c4d9b5d9157d3086939f8ab05648b
 six==1.11.0 --hash=sha256:4663c7a1dbed033cfb294f2d534bd6151c0698dc12ecabb4eaa3cb041d758528
-sqlalchemy==1.3.3 --hash=sha256:bd030ff97e7a4f3aa34aafa6b62898c7de6999784c8b4828b3e8b31cf69dae9c
+sqlalchemy==1.3.3 --hash=sha256:bd030ff97e7a4f3aa34aafa6b62898c7de6999784c8b4828b3e8b31cf69dae9c --hash=sha256:680b2ae6a728941c9fe661c85f2309a69408e7ec8ed8fa39d03e07595259b75b
 urllib3==1.24.3 --hash=sha256:028309393606e28e640e2031edd27eb969c94f9364b0871912608aaa8e66c96e