Rebuild f34 with LLVM 12.

rust.spec

@@ -53,7 +53,7 @@
 
 Name:           rust
 Version:        1.52.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        The Rust Programming Language
 License:        (ASL 2.0 or MIT) and (BSD and MIT)
 # ^ written as: (rust itself) and (bundled libraries)
@@ -171,11 +171,6 @@ BuildRequires:  cmake >= 2.8.11
 %if 0%{?epel} == 7
 %global llvm llvm9.0
 %endif
-%if 0%{?fedora} == 34
-# aarch64 is hanging with LLVM 12-rc1, but it's fine with 12-final on rawhide.
-# Fall back to LLVM 11 on f34 for now...
-%global llvm llvm11
-%endif
 %if %defined llvm
 %global llvm_root %{_libdir}/%{llvm}
 %else
@@ -737,6 +732,9 @@ export %{rust_env}
 
 
 %changelog
+* Fri May 14 2021 Josh Stone <jistone@redhat.com> - 1.52.1-2
+- Rebuild f34 with LLVM 12.
+
 * Mon May 10 2021 Josh Stone <jistone@redhat.com> - 1.52.1-1
 - Update to 1.52.1.