Try running some CI jobs with ALL_BUGS_ARE_FATAL

Build Tor with ALL_BUGS_ARE_FATAL macro and run:
* make check
* make test-stem
* make test-network

These jobs are allowed to fail at this point.

.travis.yml

@@ -93,6 +93,10 @@ matrix:
     #  compiler: clang
     #  os: osx
 
+    - env: ALL_BUGS_ARE_FATAL="yes"
+    - env: ALL_BUGS_ARE_FATAL="yes" SKIP_MAKE_CHECK="yes" CHUTNEY="yes"
+    - env: ALL_BUGS_ARE_FATAL="yes" SKIP_MAKE_CHECK="yes" TEST_STEM="yes"
+
   ## Allow the build to report success (with non-required sub-builds
   ## continuing to run) if all required sub-builds have succeeded.
   fast_finish: true
@@ -114,6 +118,7 @@ matrix:
     ## chutney tests
     #- env: CHUTNEY_MAKE="test-network-ipv6" CHUTNEY="yes" CHUTNEY_ALLOW_FAILURES="2" SKIP_MAKE_CHECK="yes"
     #  os: osx
+    - env: ALL_BUGS_ARE_FATAL="yes"
 
 ## (Linux only) Use a recent Linux image (Ubuntu Bionic)
 dist: bionic
@@ -241,7 +246,8 @@ script:
   - ./autogen.sh
   - CONFIGURE_FLAGS="$ASCIIDOC_OPTIONS $COVERAGE_OPTIONS $HARDENING_OPTIONS $MODULES_OPTIONS $NSS_OPTIONS $OPENSSL_OPTIONS $RUST_OPTIONS --enable-fatal-warnings --disable-silent-rules"
   - echo "Configure flags are $CONFIGURE_FLAGS CC=\"$CC $C_DIALECT_OPTIONS\""
-  - ./configure $CONFIGURE_FLAGS CC="$CC $C_DIALECT_OPTIONS"
+  - if [[ "$ALL_BUGS_ARE_FATAL" == "" ]]; then ./configure $CONFIGURE_FLAGS CC="$CC $C_DIALECT_OPTIONS"; fi
+  - if [[ "$ALL_BUGS_ARE_FATAL" != "" ]]; then ./configure CFLAGS="-DALL_BUGS_ARE_FATAL" $CONFIGURE_FLAGS CC="$CC $C_DIALECT_OPTIONS"; fi
   ## We run `make check` because that's what https://jenkins.torproject.org does.
   - if [[ "$SKIP_MAKE_CHECK" == "" ]]; then make check; fi
   - if [[ "$DISTCHECK" != "" ]]; then make distcheck DISTCHECK_CONFIGURE_FLAGS="$CONFIGURE_FLAGS"; fi