For linux, explicitly use libc.so.6 instead of 'c', since JNA will ma…

…p that to 'libc.so' which won't work on most linux distros.

git-svn-id: http://svn.codehaus.org/jruby/trunk/jruby@7930 961051c9-f516-0410-bf72-c9f7e237a7b7

src/org/jruby/ext/ffi/Platform.java

@@ -87,7 +87,7 @@ private static final String getArchitecture() {
     public static final boolean IS_LINUX = OS.equals(LINUX);
     public static final boolean IS_SOLARIS = OS.equals(SOLARIS);
     public static final boolean IS_BSD = IS_MAC || IS_FREEBSD || IS_OPENBSD;
-    public static final String LIBC = IS_WINDOWS ? "msvcrt" : "c";
+    public static final String LIBC = IS_WINDOWS ? "msvcrt" : IS_LINUX ? "libc.so.6" : "c";
     public static final String NAME = String.format("%s-%s", ARCH, OS);
     public static final int BIG_ENDIAN = 4321;
     public static final int LITTLE_ENDIAN = 1234;