Fix native-build/target/lib wanted but build in native-build/target/lib64 (#9410)

Motivation:

On openSUSE (probably more), 64 bit builds use lib64, e.g. /usr/lib64, and
configure picks this up and builds the native library in
native-build/target/lib64 where maven is not looking.

Modifications:

Explicitly specify --libdir=${project.build.directory}/native-build/target/lib
during configuration.

Result:

Maven uses the correct lib directory.

transport-native-epoll/pom.xml

@@ -155,6 +155,7 @@
                   <configureArgs>
                     <arg>${jni.compiler.args.ldflags}</arg>
                     <arg>${jni.compiler.args.cflags}</arg>
+                    <configureArg>--libdir=${project.build.directory}/native-build/target/lib</configureArg>
                   </configureArgs>
                 </configuration>
                 <goals>

transport-native-kqueue/pom.xml

@@ -84,6 +84,7 @@
                          explicitly set the target platform. Otherwise we may get fatal link errors due to weakly linked
                          methods which are not expected to be present on MacOS (e.g. accept4). -->
                     <arg>MACOSX_DEPLOYMENT_TARGET=10.6</arg>
+                    <configureArg>--libdir=${project.build.directory}/native-build/target/lib</configureArg>
                   </configureArgs>
                 </configuration>
                 <goals>