XXX rewrite matrix

Author: kulp

.github/workflows/c.yml

@@ -7,8 +7,8 @@ on:
     branches: [ develop ]
 
 env:
-  SDL: 0
-  JIT: 0 # XXX debugging only
+  SDL: 1
+  JIT: 1
   ICARUS: 1
   CTEST_OUTPUT_ON_FAILURE: 1
   LIGHTNING_VERSION: 2.2.3
@@ -17,9 +17,11 @@ jobs:
   build:
     strategy:
       matrix:
-        os:
-        - ubuntu-latest
-        - macos-latest
+        include:
+        - os: ubuntu-latest
+          SDL: 0 # "webp" is failing to be loaded in CI
+        - os: macos-latest
+          JIT: 0 # GNU Lightning is throwing Bus Error
     runs-on: ${{ matrix.os }}
     steps:
     - name: Set up Homebrew