Add ARM64 Suppot for Travis-Ci

Signed-off-by: odidev <odidev@puresoftware.com>

.travis.yml

@@ -1,5 +1,11 @@
 sudo: required
-dist: xenial
+dist: focal
+group: edge
+virt: vm
+arch:
+- amd64
+- arm64-graviton2
+
 
 os: linux
 
@@ -106,7 +112,7 @@ install:
 
 script:
   - util/mirror-tarballs > build.log 2>&1 || (cat build.log && exit 1)
-  - cd openresty-*
+  - cd openresty-1.19.3.1
   - ./configure --prefix=$OPENRESTY_PREFIX --with-cc-opt="-I$PCRE_INC -I$OPENSSL_INC" --with-ld-opt="-L$PCRE_LIB -L$OPENSSL_LIB -Wl,-rpath,$PCRE_LIB:$OPENSSL_LIB" --with-pcre-jit --with-http_ssl_module --with-debug -j$JOBS > build.log 2>&1 || (cat build.log && exit 1)
   - make -j$JOBS > build.log 2>&1 || (cat build.log && exit 1)
   - sudo make install > build.log 2>&1 || (cat build.log && exit 1)