mysql: Build with rocksdb jemalloc

Because of problems with ruby's mysql2.

private/mysql/mysql.SlackBuild

@@ -29,7 +29,7 @@
 cd $(dirname $0) ; CWD=$(pwd)
 
 PKGNAM=mysql
-VERSION=${VERSION:-8.0.29}
+VERSION=${VERSION:-8.0.30}
 BUILD=${BUILD:-1}
 
 # To reduce the package size, the embedded server may be omitted.  Currently
@@ -121,7 +121,7 @@ cmake \
   -DWITH_EMBEDDED_SERVER=${EMBEDDED} \
   -DWITH_LIBARCHIVE=ON \
   -DWITH_READLINE=ON \
-  -DWITH_JEMALLOC=system \
+  -DWITH_ROCKSDB_JEMALLOC=ON \
   -DWITH_ZLIB=system \
   -DWITH_EXTERNAL_ZLIB=ON \
   -DWITH_SSL=system \
@@ -131,8 +131,8 @@ cmake \
   -DAWS_SDK_EXTERNAL_PROJECT=OFF \
   .. || exit 1
 
-# doesn't currently compile
-#  -DWITH_ROCKSDB_JEMALLOC=ON \
+# ruby mysql2 fails to run
+#  -DWITH_JEMALLOC=system \
 
 make $NUMJOBS || make || exit 1
 make install DESTDIR=$PKG || exit 1