Revert "Made principia_make.sh executable."
Revert "Made principia_make.sh executable."

This reverts commit 16b53ce8a9e3f60f59c935aff047a31288b66365.

pleroy/Principia,pleroy/Principia,pleroy/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,mockingbirdnest/Principia,pleroy/Principia,mockingbirdnest/Principia