travis.yml: --enable-debug-tcg to check-tcg

This adds a whole bunch of asserts which will catch bugs you might
introduce into the TCG code.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

.travis.yml

@@ -334,14 +334,14 @@ matrix:
 
     # Run check-tcg against linux-user
     - env:
-        - CONFIG="--disable-system"
+        - CONFIG="--disable-system --enable-debug-tcg"
         - TEST_CMD="make -j3 check-tcg V=1"
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"
 
 
     # Run check-tcg against softmmu targets
     - env:
-        - CONFIG="--target-list=xtensa-softmmu,arm-softmmu,aarch64-softmmu,alpha-softmmu"
+        - CONFIG="--enable-debug-tcg --target-list=xtensa-softmmu,arm-softmmu,aarch64-softmmu,alpha-softmmu"
         - TEST_CMD="make -j3 check-tcg V=1"
         - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"