handle bad SDK Version values in APKs

Even though it is invalid to have *SdkVersion in AndroidManifest.xml set as
anything but an integer, sometimes people manage to get something in there.
`fdroid update` needs to be able to handle all that.

* https://developer.android.com/guide/topics/manifest/uses-sdk-element#min
* https://gitlab.com/souch/SMSbypass/blob/v0.9/app/src/main/AndroidManifest.xml#L29
* https://gitlab.com/souch/SMSbypass/blob/v0.9/app/src/main/res/values/strings.xml#L27

admin#65

tests/metadata/souch.smsbypass.txt

@@ -0,0 +1,52 @@
+Categories:Phone & SMS
+License:GPL-3.0
+Web Site:https://gitlab.com/souch/SMSbypass
+Source Code:https://gitlab.com/souch/SMSbypass/tree/HEAD
+Issue Tracker:https://gitlab.com/souch/SMSbypass/issues
+Donate:http://rodolphe.souchaud.free.fr/donate
+FlattrID:cad90e036b975ed129a3ce80a0750466
+
+Auto Name:Battery level
+Summary:Filter SMS and show them in a fake app
+Description:
+In order to keep away curious eyes, SMS-bypass filters incoming SMS messages
+before they reach your inbox. Based on bughunter2.smsfilter.
+
+Features:
+
+* Discrete fake app "Battery level": Long tap on Battery percentage will show SMS.
+* Filter incoming SMS specified address: redirect the SMS to SMS-bypass messages list; remove SMS arrival sound or vibration; show a discreet notification icon (battery level); vibrate if checked in settings
+* Add contact from contact list
+* Export messages to a text file
+.
+
+Repo Type:git
+Repo:https://gitlab.com/souch/SMSbypass.git
+
+Build:0.8,5
+    commit=v0.8
+    subdir=app
+    gradle=yes
+    prebuild=sed -i -e '/minSdkVersion/amaxSdkVersion 19\n' build.gradle
+
+Build:0.8b,6
+    disable=don't build, just use as template for AUM, correct VC is 8
+    commit=2bd6164ff6391906af2af2b484de69a4ff926a01
+    subdir=app
+    gradle=yes
+
+Build:0.8.1,8
+    disable=mistagged
+    commit=v0.8.1
+    subdir=app
+    gradle=yes
+
+Build:0.9,9
+    commit=v0.9
+    subdir=app
+    gradle=yes
+
+Auto Update Mode:Version v%v
+Update Check Mode:Tags
+Current Version:0.9
+Current Version Code:9