Do NOT pass MAKEFLAGS to sub-makes (#3121)
Do NOT pass MAKEFLAGS to sub-makes (#3121)

Passing MAKEFLAGS is not necessary because "most" flags are propagated
already see:
https://www.gnu.org/software/make/manual/html_node/Options_002fRecursion.html#Options_002fRecursion .

This doesn't cause a problem when Makefile-lib-llvm is invoked directly
from the command line because MAKELEVEL=0 and  MAKEFLAGS did not have a
"w" in it. But when Makefile-lib-llvm is invoked from .package/deb/rules
it is not the root, MAKELEVEL > 0, so MAKEFLAGS has a "w". Thus, when
passing $(MAKEFLAGS) on the command line to Makefile-ponyc the "w" ends up
to be a Goal and Makefile-ponyc fails.
sgebbie/ponyc,dipinhora/ponyc,ponylang/ponyc,cquinn/ponyc,kulibali/ponyc,sgebbie/ponyc,kulibali/ponyc,jemc/ponyc,ponylang/ponyc,sgebbie/ponyc,cquinn/ponyc,jemc/ponyc,cquinn/ponyc,cquinn/ponyc,dipinhora/ponyc,sgebbie/ponyc,kulibali/ponyc,sgebbie/ponyc,kulibali/ponyc,jemc/ponyc,dipinhora/ponyc,ponylang/ponyc