pySim-prog.py: add support for MSISDN programming

This change implements programming of EF.MSISDN as per 3GPP TS 31.102,
sections 4.2.26 and 4.4.2.3, excluding the following fields:

  - Alpha Identifier (currently 'FF'O * 20),
  - Capability/Configuration1 Record Identifier ('FF'O),
  - Extension1 Record Identifier ('FF'O).

This feature is introduced exclusively for sysmoUSIM-SJS1.
Othere SIM card types need to be tested.

Change-Id: Ie033a0ffc3697ae562eaa7a241a0f6af6c2b0594
diff --git a/pysim-testdata/sysmoUSIM-SJS1.data b/pysim-testdata/sysmoUSIM-SJS1.data
index b7c1e81..c23f9f1 100644
--- a/pysim-testdata/sysmoUSIM-SJS1.data
+++ b/pysim-testdata/sysmoUSIM-SJS1.data
@@ -4,4 +4,5 @@
 KI=FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
 OPC=FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
 IMSI=001010000000102
+MSISDN=+77776336143
 ADM=55538407