Rename quick1_debug back to declarative_debug

The library name changed back from quick1 to declarative, so the
debug option should be renamed accordingly.

Change-Id: I192520a0a4de4764cf93da8cdbb14e24ba7de093
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

diff --git a/mkspecs/features/quick1_debug.prf b/mkspecs/features/declarative_debug.prf
similarity index 100%
rename from mkspecs/features/quick1_debug.prf
rename to mkspecs/features/declarative_debug.prf