gh-actions: move environment setting to workflow level

.github/workflows/build-and-test.yml

@@ -4,6 +4,14 @@ on:
   push:
     branches: [ devel/gh-actions ]
 
+env:
+  SETUP_PATH: .:.ci
+  SET: test01
+  VV: 1
+  BASE_RECURSIVE: NO
+  CMP: gcc
+  APT: re2c
+
 jobs:
   build:
     name: Build on ${{ matrix.os }}
@@ -11,12 +19,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-18.04, ubuntu-16.04, windows-2019]
-    env:
-      SETUP_PATH: .:.ci
-      SET: test01
-      VV: 1
-      BASE_RECURSIVE: NO
-      CMP: gcc
 
     steps:
     - uses: actions/checkout@v2
@@ -34,11 +36,6 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-18.04, ubuntu-16.04, windows-2019]
-    env:
-      SETUP_PATH: .:.ci
-      SET: test00
-      VV: 1
-      BASE_RECURSIVE: NO
 
     steps:
     - uses: actions/checkout@v2