Revert "Update Makefile.pre.in"

This reverts commit 8638770.

Signed-off-by: Filipe Laíns <lains@riseup.net>

Author: FFY00

Makefile.pre.in

@@ -127,7 +127,7 @@ PY_CORE_CFLAGS=	$(PY_STDMODULE_CFLAGS) -DPy_BUILD_CORE
 # LDFLAGS used to build executables and shared targets.
 PY_CORE_LDFLAGS=$(PY_LDFLAGS) $(PY_LDFLAGS_NODIST)
 CONFIGURE_EXE_LDFLAGS=@EXE_LDFLAGS@
-PY_CORE_EXE_LDFLAGS=$(CONFIGURE_EXE_LDFLAGS) $(PY_LDFLAGS_NODIST)
+PY_CORE_EXE_LDFLAGS:= $(if $(CONFIGURE_EXE_LDFLAGS), $(CONFIGURE_EXE_LDFLAGS) $(PY_LDFLAGS_NODIST), $(PY_CORE_LDFLAGS))
 # Strict or non-strict aliasing flags used to compile dtoa.c, see above
 CFLAGS_ALIASING=@CFLAGS_ALIASING@