Bug 26203: Update mozconfig for Windows nightly build

Also enable rust for all builds.

projects/firefox/build

@@ -65,11 +65,9 @@ EOF
   export SELFRANDO_skip_shuffle=
 [% END -%]
 
-[% IF ! c("var/windows") %]
-  mkdir -p /var/tmp/dist
-  tar -C /var/tmp/dist -xf [% c('input_files_by_name/rust') %]
-  export PATH="/var/tmp/dist/rust/bin:$PATH"
-[% END -%]
+mkdir -p /var/tmp/dist
+tar -C /var/tmp/dist -xf [% c('input_files_by_name/rust') %]
+export PATH="/var/tmp/dist/rust/bin:$PATH"
 
 [% IF c("var/linux") %]
   # Add llvm so stylo can build

projects/firefox/config

@@ -108,7 +108,6 @@ input_files:
     enable: '[% c("var/windows-x86_64") %]'
   - project: rust
     name: rust
-    enable: '[% ! c("var/windows") %]'
   - project: llvm
     name: llvm
     enable: '[% c("var/linux") %]'

projects/firefox/mozconfig-windows-i686

@@ -24,3 +24,6 @@ ac_add_options --disable-crashreporter
 ac_add_options --disable-maintenance-service
 ac_add_options --disable-webrtc
 ac_add_options --disable-tests
+ac_add_options --disable-stylo # Bugzilla 1390583
+ac_add_options --disable-accessibility # https://sourceforge.net/p/mingw-w64/bugs/648/
+ac_add_options --disable-jemalloc # Bugzilla 1466192

projects/firefox/mozconfig-windows-x86_64

@@ -18,12 +18,12 @@ ac_add_options --enable-tor-browser-update
 ac_add_options --enable-signmar
 ac_add_options --enable-verify-mar
 
-# We can't build the sandbox code with mingw-w64:
-# https://bugzilla.mozilla.org/show_bug.cgi?id=1042426
-ac_add_options --disable-sandbox
 # Let's make sure no preference is enabling either Adobe's or Google's CDM.
 ac_add_options --disable-eme
 ac_add_options --disable-crashreporter
 ac_add_options --disable-maintenance-service
 ac_add_options --disable-webrtc
 ac_add_options --disable-tests
+ac_add_options --disable-stylo # Bugzilla 1390583
+ac_add_options --disable-accessibility # https://sourceforge.net/p/mingw-w64/bugs/648/
+ac_add_options --disable-jemalloc # Bugzilla 1466192