strip-llvm: Remove all libLLVM*.a

46efff459a regressed this aspect,
where libLLVM-<version>.{so,dylib,dll} was meant to be kept, but
also ended up keeping libLLVM<name>.a. (This only matters if trying
to strip a build done with --full-llvm.)

strip-llvm.sh

@@ -123,7 +123,8 @@ rm -rf clang clang-c clang-tidy lld llvm llvm-c lldb
 cd ..
 cd lib
 rm -f *.dll.a
-for i in lib*.a *.so* *.dylib* cmake; do
+rm -f lib*.a
+for i in *.so* *.dylib* cmake; do
     case $i in
     liblldb*|libclang-cpp*|libLLVM*)
         ;;