Rearrange steps

.github/workflows/cmake_ctest_multiplatform.yml

@@ -90,15 +90,15 @@ jobs:
         # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
         run: ctest --build-config ${{ matrix.build_type }}
 
+      - name: Install llvm-cov lcov
+        run: sudo apt update && sudo apt install llvm lcov
+        if: ${{ matrix.os == 'ubuntu-latest' }}
+
       - name: Create gcov for clang script
         working-directory: ${{ steps.strings.outputs.build-output-dir }}
         run: echo '#!/bin/bash' >> gcov_for_clang && echo "exec llvm-cov gcov \"\$@\"" >> gcov_for_clang && sudo cp gcov_for_clang /usr/bin
         if: ${{ matrix.os == 'ubuntu-latest' && matrix.c_compiler == 'clang' }}
 
-      - name: Install llvm-cov lcov
-        run: sudo apt update && sudo apt install llvm lcov
-        if: ${{ matrix.os == 'ubuntu-latest' }}
-
       - name: Gather coverage GCC
         working-directory: ${{ steps.strings.outputs.build-output-dir }}
         run: lcov --capture --directory . | sed s@^SF:%s/@SF:@ > lcov.info