[Bug bootstrap/54696] Makefile doesn't propagate CPPFLAGS to host libraries

[egall at gwmail dot gwu.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54696

Eric Gallager <egall at gwmail dot gwu.edu> changed:

           What    |Removed                     |Added
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                 CC|                            |egall at gwmail dot gwu.edu

--- Comment #2 from Eric Gallager <egall at gwmail dot gwu.edu> ---
Ran into something similar in a combined tree with gdb, so once this is fixed
for gcc, remember to have the gdb folks merge it as well...