travis.yml: enable linux-gcc-debug-tcg cache

Create a new cache for the --enable-debug-tcg builds which is separate
from the normal debug builds which generate different code. We also
enable debug-tcg for the new plugins based builds as we want to ensure
any breakage to TCG is picked up by the sanity checks.

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

.travis.yml

@@ -135,7 +135,7 @@ matrix:
     # TCG debug can be run just on its own and is mostly agnostic to user/softmmu distinctions
     - env:
         - CONFIG="--enable-debug-tcg --disable-system"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug"
+        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
 
     - env:
@@ -336,29 +336,29 @@ matrix:
     - env:
         - CONFIG="--disable-system --enable-debug-tcg"
         - TEST_CMD="make -j3 check-tcg V=1"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"
+        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
 
     # Run check-tcg against linux-user (with plugins)
     # we skip sparc64-linux-user until it has been fixed somewhat
     - env:
-        - CONFIG="--disable-system --enable-plugins --target-list-exclude=sparc64-linux-user"
+        - CONFIG="--disable-system --enable-plugins --enable-debug-tcg --target-list-exclude=sparc64-linux-user"
         - TEST_CMD="make -j3 check-tcg V=1"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"
+        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
 
     # Run check-tcg against softmmu targets
     - env:
         - CONFIG="--enable-debug-tcg --target-list=xtensa-softmmu,arm-softmmu,aarch64-softmmu,alpha-softmmu"
         - TEST_CMD="make -j3 check-tcg V=1"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"
+        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
 
     # Run check-tcg against softmmu targets (with plugins)
     - env:
-        - CONFIG="--enable-plugins --target-list=xtensa-softmmu,arm-softmmu,aarch64-softmmu,alpha-softmmu"
+        - CONFIG="--enable-plugins --enable-debug-tcg --target-list=xtensa-softmmu,arm-softmmu,aarch64-softmmu,alpha-softmmu"
         - TEST_CMD="make -j3 check-tcg V=1"
-        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-default"
+        - CACHE_NAME="${TRAVIS_BRANCH}-linux-gcc-debug-tcg"
 
 
     # Release builds