Travis CI: Try 32 bit build by adding ARCH="x86" argument"

.travis.yml

@@ -461,6 +461,55 @@ matrix:
       NO_CACHING=NO
       MACOSX_PACKAGE=1
 
+  -
+    os: linux
+    compiler: clang
+    env:
+      N=ClangLinux32Max
+      ARCH="x86"
+      BUILD_TYPE=Release
+      ENABLE_SSL_DYNAMIC_LOADING=YES
+      OPENSSL_1_1=NO
+      ENABLE_CXX=NO
+      ENABLE_LUA_SHARED=NO
+      C_STANDARD=auto
+      CXX_STANDARD=auto
+      FEATURES=31
+      BUILD_SHARED=NO
+      NO_FILES=NO
+      ENABLE_SSL=YES
+      NO_CGI=NO
+      ENABLE_IPV6=YES
+      ENABLE_WEBSOCKETS=YES
+      ENABLE_SERVER_STATS=YES
+      ENABLE_LUA=NO
+      ENABLE_DUKTAPE=NO
+      NO_CACHING=YES
+
+  -
+    os: linux
+    compiler: gcc
+    env:
+      N=GCCLinux32Max
+      ARCH="x86"
+      BUILD_TYPE=Release
+      ENABLE_SSL_DYNAMIC_LOADING=YES
+      OPENSSL_1_1=NO
+      ENABLE_CXX=NO
+      ENABLE_LUA_SHARED=NO
+      C_STANDARD=auto
+      CXX_STANDARD=auto
+      FEATURES=31
+      BUILD_SHARED=NO
+      NO_FILES=NO
+      ENABLE_SSL=YES
+      NO_CGI=NO
+      ENABLE_IPV6=YES
+      ENABLE_WEBSOCKETS=YES
+      ENABLE_SERVER_STATS=YES
+      ENABLE_LUA=NO
+      ENABLE_DUKTAPE=NO
+      NO_CACHING=YES
 
 ### Test all build types:
 # According to CMakeLists, options are: