fix RID bootstrap, do it once

RuntimeIdentifierGraph-Rosa.patch

@@ -0,0 +1,23 @@
+--- a/sdk/3.1.112/RuntimeIdentifierGraph.json	2021-03-13 22:54:54.385414703 +0300
++++ b/sdk/3.1.112/RuntimeIdentifierGraph.json	2021-03-13 22:56:49.227808138 +0300
+@@ -1,5 +1,20 @@
+ {
+   "runtimes": {
++    "rosa.2019.1": {
++      "#import": [
++        "linux"
++      ]
++    },
++    "rosa.2019.1-arm64": {
++      "#import": [
++        "linux-arm64"
++      ]
++    },
++    "rosa.2019.1-x64": {
++      "#import": [
++        "linux-x64"
++      ]
++    },
+     "alpine": {
+       "#import": [
+         "linux-musl"

dotnet3.1.spec

@@ -96,6 +96,8 @@ Patch301:       core-setup-gcc11.patch
 
 # Disable telemetry by default; make it opt-in
 Patch500:       cli-telemetry-optout.patch
+# fix RID bootstrap, do it once
+Patch501:       RuntimeIdentifierGraph-Rosa.patch
 
 ExclusiveArch:  aarch64 x86_64
 
@@ -403,7 +405,12 @@ cat /etc/os-release
 %if %{without bootstrap}
 # We need to create a copy because we will mutate this
 cp -a %{_libdir}/dotnet previously-built-dotnet
+ %if 1
+pushd previously-built-dotnet
+patch -p1 < %{P:501}
+popd
 %endif
+ %endif
 
 %if 0%{?fedora} > 32 || 0%{?rhel} > 8
 # Setting this macro ensures that only clang supported options will be