fixup! Compile program in the nightly CI

Author: antoyo

.github/workflows/nightly_rustc.yml

@@ -130,9 +130,7 @@ jobs:
         objcopy --dump-section .comment=comment target/debug/hello_world
         cat comment
         echo "*** 4"
-        grep --text "^.rustc version .* with libgccjit" comment
+        grep "rustc version .* with libgccjit" comment
         echo "*** 5"
-        grep --text 'libgccjit' comment
-        echo "*** 6"
-        grep --text 'GCC: ' comment
+        grep 'GCC: ' comment
         echo "*** 7"