arm64 drone tests

Author: sdarwin

.drone.star

@@ -14,6 +14,8 @@ windowsglobalimage="cppalliance/dronevs2019"
 
 def main(ctx):
   return [
+  linux_cxx("Clang 12 arm64", "clang++-12", packages="clang-12 libstdc++-9-dev", llvm_os="focal", llvm_ver="12", buildtype="boost", buildscript="drone", image="cppalliance/droneubuntu2004:multiarch", environment={'B2_TOOLSET': 'clang-12', 'B2_CXXSTD': '17,20', 'DRONE_JOB_UUID': '7719a1c783m'}, arch="arm64", globalenv=globalenv),
+  linux_cxx("gcc 11 arm64", "g++-11", packages="g++-11", buildtype="boost", buildscript="drone", image="cppalliance/droneubuntu2004:multiarch", environment={'B2_TOOLSET': 'gcc-11', 'B2_CXXSTD': '17,2a', 'DRONE_JOB_UUID': '0716d9708dm'}, arch="arm64", globalenv=globalenv),
   linux_cxx("docs", "g++", packages="docbook docbook-xml docbook-xsl xsltproc libsaxonhe-java default-jre-headless flex libfl-dev bison unzip rsync", buildtype="docs", buildscript="drone", image="cppalliance/droneubuntu1804:1", environment={'COMMENT': 'docs', 'DRONE_JOB_UUID': 'b6589fc6ab'}, globalenv=globalenv),
   linux_cxx("codecov", "g++-8", packages="g++-8", buildtype="codecov", buildscript="drone", image=linuxglobalimage, environment={'COMMENT': 'codecov.io', 'LCOV_BRANCH_COVERAGE': '0', 'B2_CXXSTD': '11', 'B2_TOOLSET': 'gcc-8', 'B2_DEFINES': 'BOOST_NO_STRESS_TEST=1', 'CODECOV_TOKEN': {'from_secret': 'codecov_token'}, 'DRONE_JOB_UUID': '356a192b79'}, globalenv=globalenv),
   linux_cxx("valgrind", "clang++-6.0", packages="clang-6.0 libc6-dbg libstdc++-8-dev", llvm_os="bionic", llvm_ver="6.0", buildtype="valgrind", buildscript="drone", image=linuxglobalimage, environment={'COMMENT': 'valgrind', 'B2_TOOLSET': 'clang-6.0', 'B2_CXXSTD': '11,14', 'B2_DEFINES': 'BOOST_NO_STRESS_TEST=1', 'B2_VARIANT': 'debug', 'B2_TESTFLAGS': 'testing.launcher=valgrind', 'VALGRIND_OPTS': '--error-exitcode=1', 'DRONE_JOB_UUID': 'da4b9237ba'}, globalenv=globalenv),