Don't recursively make when calling create_all_symlinks.sh from a makefile.

The target files should be built as dependencies in the rules that call
create_all_symlinks.sh. We already did this in
sdk/adtproductbuild/Android.mk
and
sdk/monitor/Android.mk.

Bug: 10347826
Change-Id: I465d227baa7c22ad806652ca7eb20262a4bccf6f