Set TargetsLinuxGlibc to false on Android

[akoeplinger]

It's not using glibc. One could argue that we should set TargetsLinuxBionic=true on Android but that'd go against how we used that name elsewhere.

Follow-up to #109526

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/runtime-infrastructure
See info in area-owners.md if you want to be subscribed.

[jkotas]

that'd go against how we used that name elsewhere.

Where would it break? I have spot checked a few places and it seems to be fine. It would allow us to simplify '$(TargetsAndroid)' == 'true' or '$(TargetsLinuxBionic)' == 'true' conditions that we have in number of places.

[jkoritzinsky]

Yeah I'd assume that Android implies Linux Bionic and for the small number of cases where that differs, we'd check "Linux Bionic and not Android"

[akoeplinger]

Example breakages:

• we'd use the wrong runner script here:

  runtime/eng/testing/tests.targets

  Line 16 in 5d9d6f5

  <RunScriptInputName Condition="'$(TargetsLinuxBionic)' == 'true' and '$(RunScriptWindowsCmd)' != 'true'">BionicRunnerTemplate.sh</RunScriptInputName>

• we'd build the host subset here:
  

  runtime/eng/Subsets.props

  Lines 40 to 41 in 5d9d6f5

  	<DefaultSubsets Condition="'$(TargetsMobile)' == 'true'">mono+libs+packs</DefaultSubsets>
  	<DefaultSubsets Condition="'$(TargetsLinuxBionic)' == 'true'">mono+libs+host+packs</DefaultSubsets>

• we'd use the wrong MonoSharedLibName here:
  

  runtime/src/mono/mono.proj

  Line 25 in 5d9d6f5

  <MonoSharedLibName Condition="('$(TargetsiOS)' == 'true' or '$(TargetstvOS)' == 'true' or '$(TargetsMacCatalyst)' == 'true' or '$(TargetsAndroid)' == 'true' or '$(TargetsBrowser)' == 'true') and '$(TargetsLinuxBionic)' != 'true'">$(MonoLibName)</MonoSharedLibName>

Those can be fixed of course and I don't really feel strongly one way or another but we need to be careful.

[akoeplinger]

I think I prefer fixing TargetsLinuxBionic=true on Android instead, the number of places where it matters is indeed quite small. I'll update the PR (not today since it's almost weekend here 😄)