Add gcc10/arm64 DYNAMIC_ARCH build

.drone.yml

@@ -190,3 +190,25 @@ steps:
     - make -C ctest $COMMON_FLAGS
     - make -C utest $COMMON_FLAGS
     - make -C cpp_thread_test dgemm_tester
+---
+kind: pipeline
+name: arm64_gcc10
+
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+- name: Build and Test
+  image: ubuntu:20.04
+  environment:
+    CC: gcc-10
+    COMMON_FLAGS: 'TARGET=ARMV8 DYNAMIC_ARCH=1'
+  commands:
+    - echo "MAKE_FLAGS:= $COMMON_FLAGS"
+    - apt-get update -y
+    - apt-get install -y make $CC gfortran-10 perl python g++
+    - $CC --version
+    - make QUIET_MAKE=1 $COMMON_FLAGS
+    - make -C test $COMMON_FLAGS
+