Make the plugin build script for for Mac OSX

The build_server script used to build the plugin zip file was Linux
specific. This changeset tweaks the scripts such that they will also
run on Mac OSX. It also adds various .gitignore filters such that the
temporary files created by the build script are ignored by git.

Change-Id: I77cfe6bfb65be86c11beb50bcab9c345433b5a8e
diff --git a/.gitignore b/.gitignore
index 268cc87..9a50b0b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,18 @@
 *.pyc
 Thumbs.db
 *.class
+
+# Hide temporary files created by the build_server script
+eclipse/assemble.com.android.ide.eclipse.*.xml
+eclipse/package.com.android.ide.eclipse.*.xml
+eclipse/final*Versions*.properties
+eclipse/plugins/com.android.ide.eclipse.*/@dot*
+eclipse/plugins/com.android.*/javaCompiler...args
+eclipse/plugins/com.android.ide.eclipse.adt/build.xml
+eclipse/plugins/com.android.ide.eclipse.ddms/build.xml
+eclipse/plugins/com.android.ide.eclipse.hierarchyviewer/build.xml
+eclipse/plugins/com.android.ide.eclipse.traceview/build.xml
+eclipse/features/com.android.ide.eclipse.*/build.xml
+eclipse/features/com.android.ide.eclipse.*/*.zip
+/eclipse/v[0-9-]*-[0-9]*
+/status-output