[GR-30949] Fix typo in arch string.

PullRequest: graal/8816

Author: fangerer

truffle/src/com.oracle.truffle.api/src/com/oracle/truffle/api/memory/ByteArraySupports.java

@@ -80,7 +80,7 @@ private ByteArraySupports() {
     static {
         // We only use Unsafe for platforms that we know support it, and that support unaligned
         // accesses.
-        if (System.getProperty("os.arch").equals("x86-64") || System.getProperty("os.arch").equals("aarch64") || System.getProperty("os.arch").equals("amd64")) {
+        if (System.getProperty("os.arch").equals("x86_64") || System.getProperty("os.arch").equals("aarch64") || System.getProperty("os.arch").equals("amd64")) {
             final ByteArraySupport nativeOrder = new CheckedByteArraySupport(new UnsafeByteArraySupport());
             if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
                 BIG_ENDIAN = nativeOrder;