make/mapfiles/libnio/mapfile-linux

rev 16196 : 8168628: (fc) SIGBUS when extending file size to map it
Summary: Synchronize file extension and subsequent map0(); on Linux use fallocate64() instead of ftruncate64().
Reviewed-by: rehn, simonis, alanb

*** 71,80 ****
--- 71,81 ----
                  Java_sun_nio_ch_FileDispatcherImpl_read0;
                  Java_sun_nio_ch_FileDispatcherImpl_readv0;
                  Java_sun_nio_ch_FileDispatcherImpl_release0;
                  Java_sun_nio_ch_FileDispatcherImpl_size0;
                  Java_sun_nio_ch_FileDispatcherImpl_truncate0;
+                 Java_sun_nio_ch_FileDispatcherImpl_allocate0;
                  Java_sun_nio_ch_FileDispatcherImpl_write0;
                  Java_sun_nio_ch_FileDispatcherImpl_writev0;
                  Java_sun_nio_ch_FileKey_init;
                  Java_sun_nio_ch_FileKey_initIDs;
                  Java_sun_nio_ch_InheritedChannel_close0;