More java.lang.System.mapLibraryName dylib vs. jnilib confusion

...like a76261ac9e40eb57e942db2c7aea8b8a5e904ff2

Change-Id: I803dc81344efb5e8021d9ef4146c06ecf82ca63b
(cherry picked from commit 0d396800021684a8c0875e45ed1440011fd7f9b0)
Reviewed-on: https://gerrit.libreoffice.org/8040
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>