Bug 1535399 - Add --enable-proxy-bypass-protection to mingw builds r=dmajor

Tor compiles with these, using the mingw build, so it makes sense to
replicate their configuration.

Differential Revision: https://phabricator.services.mozilla.com/D28939

--HG--
extra : moz-landing-system : lando

browser/config/mozconfigs/win32/mingwclang

@@ -34,6 +34,9 @@ ac_add_options --with-toolchain-prefix=i686-w64-mingw32-
 ac_add_options --disable-warnings-as-errors
 MOZ_COPY_PDBS=1
 
+# This replicates Tor's configuration
+ac_add_options --enable-proxy-bypass-protection
+
 # These aren't supported on mingw at this time
 ac_add_options --disable-maintenance-service
 ac_add_options --disable-webrtc # Bug 1393901

browser/config/mozconfigs/win64/mingwclang

@@ -34,6 +34,9 @@ ac_add_options --with-toolchain-prefix=x86_64-w64-mingw32-
 ac_add_options --disable-warnings-as-errors
 MOZ_COPY_PDBS=1
 
+# This replicates Tor's configuration
+ac_add_options --enable-proxy-bypass-protection
+
 # These aren't supported on mingw at this time
 ac_add_options --disable-maintenance-service
 ac_add_options --disable-webrtc # Bug 1393901