[corlib] Makes GetReferencedAssemblies test more reliable

[marek-safar]

No description provided.

[akoeplinger]

Looks good but it'd be nice to understand which referenced assembly caused the issue.

[marek-safar]

Don't think it matters, we want to test specific case not randomly redirected assemblies

[akoeplinger]

please backport to 2017-10 too

[akoeplinger]

For future reference the assembly that caused this test to fail in XA was Xamarin.Android.NUnitLite.dll which has Flags == AssemblyNameFlags.PublicKey:

alexander:~/dev/xamarin-android$ ikdasm --assemblyref /Users/alexander/dev/xamarin-android/bin/TestDebug/monodroid_corlib_test.dll
AssemblyRef Table
1: Version=2.0.5.0
	Name=mscorlib
	Flags=0x00000000
	Public Key:
0x00000000: 7C EC 85 D7 BE A7 79 8E

2: Version=1.0.0.0
	Name=Xamarin.Android.NUnitLite
	Flags=0x00000001
	Public Key:
0x00000000: 00 24 00 00 04 80 00 00 94 00 00 00 06 02 00 00
0x00000010: 00 24 00 00 52 53 41 31 00 04 00 00 11 00 00 00
0x00000020: 43 8A C2 A5 AC FB F1 6C BD 2B 2B 47 A6 27 62 F2
0x00000030: 73 DF 9C B2 79 5C EC CD F7 7D 10 BF 50 8E 69 E7
0x00000040: A3 62 EA 7A 45 45 5B BF 3A C9 55 E1 F2 E2 81 4F
0x00000050: 14 4E 5D 81 7E FC 4C 65 02 CC 01 2D F3 10 78 33
0x00000060: 48 30 4E 3A E3 85 73 C6 D6 58 C2 34 02 58 21 FD
0x00000070: A8 7A 0B E8 A0 D5 04 DF 56 4E 2C 93 B2 B8 78 92
0x00000080: 5F 42 50 3E 9D 54 DF EF 9F 95 86 D9 E6 F3 8A 30
0x00000090: 57 69 58 7B 1D E0 1F 6C 04 10 32 8B 2C 97 33 DB

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