DEV-34837: Remove dependency on Leopard-only /usr/local/lib/libexpat.0.1.0.dylib.

On Mac, add libexpat[.0.5.0].dylib to apr_suite package. Update
libapr-1[.0.3.7].dylib and libaprutil-1[.0.3.8].dylib with versions that
reference this expat. Make viewer_manifiest.py copy expat dylib to app bundle.

indra/newview/viewer_manifest.py

@@ -490,7 +490,9 @@ def construct(self):
                         dylibs[lib] = True
 
                 if dylibs["llcommon"]:
-                    for libfile in ("libapr-1.0.3.7.dylib", "libaprutil-1.0.3.8.dylib"):
+                    for libfile in ("libapr-1.0.3.7.dylib",
+                                    "libaprutil-1.0.3.8.dylib",
+                                    "libexpat.0.5.0.dylib"):
                         self.path(os.path.join(libdir, libfile), libfile)
 
                 #libfmodwrapper.dylib

install.xml

@@ -85,9 +85,9 @@
           <key>darwin</key>
           <map>
             <key>md5sum</key>
-            <string>30e3b60d596801a4f4c74c56ece059dc</string>
+            <string>115d8ac44a91efdb173e9b3e478c46b6</string>
             <key>url</key>
-            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/apr_suite-1.3.7-darwin-20090731.tar.bz2</uri>
+            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/apr_suite-1.3.7-darwin-20090805.tar.bz2</uri>
           </map>
           <key>linux</key>
           <map>
@@ -340,9 +340,9 @@
           <key>darwin</key>
           <map>
             <key>md5sum</key>
-            <string>9c5603e328e9f543e0a599d6b25be973</string>
+            <string>c457a0a041ac4946265889a503d26c3d</string>
             <key>url</key>
-            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/expat-1.95.8-darwin-20080812.tar.bz2</uri>
+            <uri>http://s3.amazonaws.com/viewer-source-downloads/install_pkgs/expat-1.95.8-darwin-20090805.tar.bz2</uri>
           </map>
           <key>linux</key>
           <map>