Mark default.supp as ETC instead of SHARED_LIBRARY

It's not a shared library, but a text file that will be installed in a
subdirectory under lib/...

I'm improving the sanity checks in the build system that shared
libraries are usable, and this one is not, since it's not a library at
all.

Change-Id: I5d1731b96c0b32603f5c0b4252e9396d4407a980
1 file changed