fix: use standard OSGi processor value for musl variant

Changed processor=x86-64-musl to processor=x86-64 in Bundle-NativeCode
as x86-64-musl is not a valid OSGi processor value. The OSGi spec only
recognizes x86-64 (and aliases: amd64, em64t, x86_64) for 64-bit x86.

Also fixed osname=Linux to osname=linux for consistency with other entries.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: xerial

build.sbt

@@ -111,7 +111,7 @@ OsgiKeys.additionalHeaders := Map(
     "org/xerial/snappy/native/Linux/ppc64/libsnappyjava.so;osname=linux;processor=ppc64le",
     "org/xerial/snappy/native/Linux/s390x/libsnappyjava.so;osname=linux;processor=s390x",
     "org/xerial/snappy/native/Linux/loongarch64/libsnappyjava.so;osname=linux;processor=loongarch64",
-    "org/xerial/snappy/native/Linux/x86_64-musl/libsnappyjava.so;osname=Linux;processor=x86-64-musl",
+    "org/xerial/snappy/native/Linux/x86_64-musl/libsnappyjava.so;osname=linux;processor=x86-64",
     "org/xerial/snappy/native/AIX/ppc/libsnappyjava.a;osname=aix;processor=ppc",
     "org/xerial/snappy/native/AIX/ppc64/libsnappyjava.a;osname=aix;processor=ppc64",
     "org/xerial/snappy/native/SunOS/x86/libsnappyjava.so;osname=sunos;processor=x86",