ARC: enable WebKit

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
DON'T MERGE: nsimosci - enable QT with Webkit

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
ARC: bump tools revisions to match 4.8-r3 release

 * GCC
 * uClibc

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>