[llvm] Use llvm::reverse (NFC)

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

@@ -6733,10 +6733,10 @@ llvm::getBitcodeFileContents(MemoryBufferRef Buffer) {
         // not have its own string table. A bitcode file may have multiple
         // string tables if it was created by binary concatenation, for example
         // with "llvm-cat -b".
-        for (auto I = F.Mods.rbegin(), E = F.Mods.rend(); I != E; ++I) {
-          if (!I->Strtab.empty())
+        for (BitcodeModule &I : llvm::reverse(F.Mods)) {
+          if (!I.Strtab.empty())
             break;
-          I->Strtab = *Strtab;
+          I.Strtab = *Strtab;
         }
         // Similarly, the string table is used by every preceding symbol table;
         // normally there will be just one unless the bitcode file was created