HADOOP-19615. Upgrade os-maven-plugin to 1.7.1 to support riscv64 (#7796). Contributed by Lei Wen.

hadoop-project/pom.xml

@@ -154,7 +154,7 @@
 
     <protobuf-compile.version>3.5.1</protobuf-compile.version>
     <grpc.version>1.10.0</grpc.version>
-    <os-maven-plugin.version>1.7.0</os-maven-plugin.version>
+    <os-maven-plugin.version>1.7.1</os-maven-plugin.version>
 
     <!-- define the Java language version used by the compiler -->
     <javac.version>1.8</javac.version>