travis: put macOS script inline in the macOS matrix entry

Now that we don't have separate scripts defined for native and mingw
builds, there is no point having one for macOS. It can just be inlined
at the one place it is needed.
Reviewed-by: NAndrea Bolognani <abologna@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

.travis.yml

@@ -50,22 +50,13 @@ matrix:
       env:
         - PATH="/usr/local/opt/gettext/bin:/usr/local/opt/ccache/libexec:/usr/local/opt/rpcgen/bin:$PATH"
       script:
-        /bin/sh -xc "$MACOS_CMD"
+        # We can't run 'distcheck' or 'syntax-check' because they fail on
+        # macOS, but doing 'install' and 'dist' gives us some useful coverage
+        - ./autogen.sh --prefix=$(pwd)/install-root && make -j3 && make -j3 install && make -j3 dist
 
 git:
   submodules: true
 
-env:
-  global:
-    # We can't run 'distcheck' or 'syntax-check' because they fail on
-    # macOS, but doing 'install' and 'dist' gives us some useful coverage
-    - MACOS_CMD="
-        ./autogen.sh --prefix=\$(pwd)/install-root &&
-        make -j3 &&
-        make -j3 install &&
-        make -j3 dist
-      "
-
 notifications:
   irc:
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