No static libstdc++ (#1553)

* No static libstdc++

* even less static

* no fortify x86

* fort

* fix

* fix

* Apply suggestion

* Also patch `tools/toolchains/clang6/CROSSTOOL.tpl`

* fix abi stuff

* less fort

* Update WORKSPACE

---------

Co-authored-by: Mosè Giordano <[email protected]>

Author: wsmoses

deps/ReactantExtra/.bazelrc

@@ -12,6 +12,7 @@ common --cxxopt=-w --host_cxxopt=-w
 common --define=grpc_no_ares=true
 common --noenable_bzlmod
 
+build --copt=-DMLIR_CAPI_BUILDING_LIBRARY=1
 
 build --repo_env=USE_PYWRAP_RULES=True
 build --copt=-DGRPC_BAZEL_BUILD