chore: Update version to 1.0.0-a.0 and enable linker option only when not cross compiling

configs/common/mozconfig

@@ -1,10 +1,3 @@
-if test -d "$HOME/.mozbuild/clang/bin"; then
-    export CC="$HOME"/.mozbuild/clang/bin/clang
-    export CXX="$HOME"/.mozbuild/clang/bin/clang++
-else
-    export CC=clang
-    export CXX=clang++
-fi
 
 # Browser branding
 ac_add_options --enable-update-channel=release

configs/linux/mozconfig

@@ -11,6 +11,14 @@ if ! test "$ZEN_CROSS_COMPILING"; then
         export RUSTFLAGS="$RUSTFLAGS -Ctarget-cpu=x86-64"
     fi
 
+    if test -d "$HOME/.mozbuild/clang/bin"; then
+        export CC="$HOME"/.mozbuild/clang/bin/clang
+        export CXX="$HOME"/.mozbuild/clang/bin/clang++
+    else
+        export CC=clang
+        export CXX=clang++
+    fi
+
     ac_add_options --enable-linker=lld
     ac_add_options --enable-alsa
     ac_add_options --enable-pulseaudio

surfer.json

@@ -27,7 +27,7 @@
       "brandShortName": "Zen Browser",
       "brandFullName": "Zen Browser",
       "release": {
-        "displayVersion": "1.0.0-a.1",
+        "displayVersion": "1.0.0-a.0",
         "github": {
           "repo": "zen-browser/desktop"
         },