Fix for failed ccache builds being considered successful.

Travis looks at the return code of the final command run, and since printing the ccache statistics never fails, building would never be considered as failing. Manually calling exit also causes travis to treat the build as errored, since by sourcing the build it results in the entire travis wrapper shell exiting.

utils/travis/docker_run.sh

@@ -54,16 +54,10 @@ else
     echo "compiler_check = content" >> $HOME/.ccache/ccache.conf
     
     cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GAME=true -DENABLE_SERVER=true -DENABLE_CAMPAIGN_SERVER=true -DENABLE_TESTS=true -DENABLE_NLS=false -DEXTRA_FLAGS_CONFIG="-pipe" -DEXTRA_FLAGS_RELEASE="$EXTRA_FLAGS_RELEASE" -DENABLE_STRICT_COMPILATION="$STRICT" -DENABLE_LTO=false -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache && make VERBOSE=1 -j2
-    
-# print ccache statistics
-    ccache -s
-# clear ccache statistics, so only per run info is printed rather than cumulative
-    ccache -z
   else
     scons wesnoth wesnothd campaignd boost_unit_tests build=release ctool=$CC cxxtool=$CXX --debug=time extra_flags_config="-pipe" extra_flags_release="$EXTRA_FLAGS_RELEASE" strict="$STRICT" cxx_std=$CXXSTD nls=false jobs=2 enable_lto=false
   fi
   
-# check if the build was successful
   BUILD_RET=$?
   if [ $BUILD_RET != 0 ]; then
     exit $BUILD_RET

utils/travis/steps/script.sh

@@ -12,9 +12,6 @@ if [ "$TRAVIS_OS_NAME" = "osx" ]; then
         export CCACHE_COMPILERCHECK=content
 
         xcodebuild -project Wesnoth.xcodeproj -target Wesnoth
-
-        ccache -s
-        ccache -z
     else
         ln -s build-cache/ build
         ./utils/travis/check_utf8.sh