target/sh4: fix TCG leak during gusa sequence
    
    This fixes bug #1735384 while running java under qemu-sh4. When debug
    was enabled it showed a problem with TCG temps. Once fixed I was able
    to run java -version normally.
    
    Cc: qemu-stable@nongnu.org
    Reported-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
    Suggested-by: Richard Henderson <richard.henderson@linaro.org>
    Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
    Message-Id: <20171206093050.25308-1-alex.bennee@linaro.org>
    Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
    Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
    Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
    (cherry picked from commit 6d56fc6cc372284a4571f09b361a9ccd99318103)
    Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>