RFR: JDK-8316595: Alpine build fails after JDK-8314021

[Matthias Baesken]

[JDK-8314021](https://bugs.openjdk.org/browse/JDK-8314021) causes build errors on Linux Alpine/musl (Linux ALPINE 3.17.4 gcc12.2.1)

/linuxmuslx86_64/jdk/src/hotspot/os/linux/os_linux.cpp: In static member function 'static jlong os::Linux::sendfile(int, int, jlong*, jlong)':
/linuxmuslx86_64/jdk/src/hotspot/os/linux/os_linux.cpp:4375:7: error: infinite recursion detected [-Werror=infinite-recursion]
 4375 | jlong os::Linux::sendfile(int out_fd, int in_fd, jlong* offset, jlong count) {
      | ^~
/linuxmuslx86_64/jdk/src/hotspot/os/linux/os_linux.cpp:4376:20: note: recursive call
 4376 | return sendfile64(out_fd, in_fd, (off64_t*)offset, (size_t)count);

On Alpine Linux 3.17.4 we have just this definition for sendfile64 :
sys/sendfile.h:11:ssize_t sendfile(int, int, off_t *, size_t);
sys/sendfile.h:14:#define sendfile64 sendfile

So it would be better to use ::sendfile directly.

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Commit messages:
 - JDK-8316595

Changes: https://git.openjdk.org/jdk/pull/15843/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15843&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316595
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15843.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15843/head:pull/15843

PR: https://git.openjdk.org/jdk/pull/15843