release_names: some cleanup and a fix

Author: rrbutani

toolchain/tools/llvm_release_name.py

@@ -77,28 +77,26 @@ def _linux(llvm_version):
         os_name = "linux-sles%s" % version
     elif distname == "ubuntu" and version.startswith("14.04"):
         os_name = "linux-gnu-ubuntu-14.04"
-    elif (distname == "ubuntu" and version.startswith("20.04")) or (distname == "linuxmint" and version.startswith("20")):
+    elif ((distname == "ubuntu" and version.startswith("20.04")) or
+         (distname == "linuxmint" and version.startswith("20")) or
+         (distname == "pop" and version.startswith("20"))):
         if major_llvm_version < 11:
             # There is no binary packages specifically for 20.04, but those for 18.04 works on
             # 20.04
             os_name = "linux-gnu-ubuntu-18.04"
         else:
             # release 11.0.0 started providing packaging for ubuntu 20
             os_name = "linux-gnu-ubuntu-20.04"
-    elif (distname == "ubuntu" and version.startswith("18.04")) or (distname == "linuxmint" and version.startswith("19")):
+    elif ((distname == "ubuntu" and version.startswith("18.04")) or
+        (distname == "linuxmint" and version.startswith("19")) or
+        (distname == "debian" and (version is None or int(version) == 10))):
         if major_llvm_version > 10:
             # LLVM seems to have stopped providing binary packages for ubuntu 18.04.
             os_name = "linux-gnu-ubuntu-16.04"
         else:
             os_name = "linux-gnu-ubuntu-18.04"
-
-    elif (distname == "ubuntu" and version.startswith("20")) or (distname == "pop" and version.startswith("20")):
-        # use ubuntu 18.04 clang LLVM release for ubuntu 20.04
-        os_name = "linux-gnu-ubuntu-18.04"
     elif distname in ["ubuntu", "manjaro"] or (distname == "linuxmint" and version.startswith("18")):
         os_name = "linux-gnu-ubuntu-16.04"
-    elif distname == "debian" and (version is None or int(version) == 10):
-        os_name = "linux-gnu-ubuntu-18.04"
     elif distname == "debian" and int(version) == 9 and major_llvm_version >= 7:
         os_name = "linux-gnu-ubuntu-16.04"
     elif distname == "debian" and int(version) == 8 and major_llvm_version < 7: