Make travis build and use debug variants for tests

.travis.yml

@@ -39,19 +39,26 @@ before_install:
 script:
   # Set so any failing command will abort the build
   - set -e
-  # If only we could do -j12 ;)
+  # $CC will be either `clang` or `gcc` (If only we could do -j12 ;)
-  - scons 
+  - scons $CC.debug
+  # We can be sure we're using the build/$CC.debug variant (-f so never err)
+  - rm -f build/rippled 
+  - export RIPPLED_PATH="$PWD/build/$CC.debug/rippled"
   # See what we've actually built
-  - ldd ./build/rippled
+  - ldd $RIPPLED_PATH
   # Run unittests (under gdb)
   - | # create gdb script
     echo "set env MALLOC_CHECK_=3" > script.gdb 
     echo "run" >> script.gdb
     echo "backtrace full" >> script.gdb 
     # gdb --help
-  - cat script.gdb | gdb --ex 'set print thread-events off' --return-child-result --args ./build/rippled --unittest 
+  - cat script.gdb | gdb --ex 'set print thread-events off' --return-child-result --args $RIPPLED_PATH --unittest
-  # Run integration tests
   - npm install
+  # Use build/(gcc|clang).debug/rippled
+  - |
+    echo "exports.default_server_config = {\"rippled_path\" : \"$RIPPLED_PATH\"};" > test/config.js
+
+  # Run integration tests
   - npm test
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