ci: add JERBOA_CC_OPT=-O0 (OOM fix)

ober

2f16383d2be7a3fe1c1c23c3ecb1359fe0e0d830

diff --git a/.builds/ci.yml b/.builds/ci.yml
index c640e57..715e6c6 100644
--- a/.builds/ci.yml
+++ b/.builds/ci.yml
@@ -22,6 +22,7 @@ tasks:
     source "$HOME/.cargo/env"
     export CHEZ_CONFIGURE_EXTRA=--disable-x11
     export JERBOA_NATIVE_FEATURES=tls
+    export JERBOA_CC_OPT=-O0
     make security-hardware-smoke
     make data-check
     make test