Fixed compile flags for non-module libs

The non-module libs libasteriskssl.dylib and libasteriskpj.dylib have
long been missing the AST_NOT_MODULE compile flag. This was mostly
okay, until a recent fix to improve compiler warnings when the
AST_MODULE_SELF_SYM is missing broke the build on OS X/macOS/whatever
they are calling it these days.

Change-Id: I2cb51c890824f001280a5114f2e775f97c163516